[FFmpeg-cvslog] r13413 - in trunk/libavformat: Makefile ffm.c ffm.h ffmdec.c ffmenc.c
bcoudurier
subversion
Mon May 26 05:44:32 CEST 2008
Author: bcoudurier
Date: Mon May 26 05:44:31 2008
New Revision: 13413
Log:
split ffm de/muxer
Added:
trunk/libavformat/ffm.h
- copied, changed from r13412, /trunk/libavformat/ffm.c
trunk/libavformat/ffmdec.c
- copied, changed from r13412, /trunk/libavformat/ffm.c
trunk/libavformat/ffmenc.c
- copied, changed from r13412, /trunk/libavformat/ffm.c
Removed:
trunk/libavformat/ffm.c
Modified:
trunk/libavformat/Makefile
Modified: trunk/libavformat/Makefile
==============================================================================
--- trunk/libavformat/Makefile (original)
+++ trunk/libavformat/Makefile Mon May 26 05:44:31 2008
@@ -44,8 +44,8 @@ OBJS-$(CONFIG_DV_MUXER)
OBJS-$(CONFIG_DXA_DEMUXER) += dxa.o riff.o
OBJS-$(CONFIG_EA_CDATA_DEMUXER) += eacdata.o
OBJS-$(CONFIG_EA_DEMUXER) += electronicarts.o
-OBJS-$(CONFIG_FFM_DEMUXER) += ffm.o
-OBJS-$(CONFIG_FFM_MUXER) += ffm.o
+OBJS-$(CONFIG_FFM_DEMUXER) += ffmdec.o
+OBJS-$(CONFIG_FFM_MUXER) += ffmenc.o
OBJS-$(CONFIG_FLAC_DEMUXER) += raw.o
OBJS-$(CONFIG_FLAC_MUXER) += raw.o
OBJS-$(CONFIG_FLIC_DEMUXER) += flic.o
Copied: trunk/libavformat/ffm.h (from r13412, /trunk/libavformat/ffm.c)
==============================================================================
--- /trunk/libavformat/ffm.c (original)
+++ trunk/libavformat/ffm.h Mon May 26 05:44:31 2008
@@ -1,5 +1,5 @@
/*
- * FFM (ffserver live feed) muxer and demuxer
+ * FFM (ffserver live feed) common header
* Copyright (c) 2001 Fabrice Bellard.
*
* This file is part of FFmpeg.
@@ -18,8 +18,11 @@
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#ifndef FFMPEG_FFM_H
+#define FFMPEG_FFM_H
+
#include "avformat.h"
-#include <unistd.h>
/* The FFM file is made of blocks of fixed size */
#define FFM_HEADER_SIZE 14
@@ -54,726 +57,4 @@ typedef struct FFMContext {
uint8_t packet[FFM_PACKET_SIZE];
} FFMContext;
-static int64_t get_pts(AVFormatContext *s, offset_t pos);
-
-/* disable pts hack for testing */
-int ffm_nopts = 0;
-
-#ifdef CONFIG_MUXERS
-static void flush_packet(AVFormatContext *s)
-{
- FFMContext *ffm = s->priv_data;
- int fill_size, h;
- ByteIOContext *pb = s->pb;
-
- fill_size = ffm->packet_end - ffm->packet_ptr;
- memset(ffm->packet_ptr, 0, fill_size);
-
- if (url_ftell(pb) % ffm->packet_size)
- av_abort();
-
- /* put header */
- put_be16(pb, PACKET_ID);
- put_be16(pb, fill_size);
- put_be64(pb, ffm->pts);
- h = ffm->frame_offset;
- if (ffm->first_packet)
- h |= 0x8000;
- put_be16(pb, h);
- put_buffer(pb, ffm->packet, ffm->packet_end - ffm->packet);
- put_flush_packet(pb);
-
- /* prepare next packet */
- ffm->frame_offset = 0; /* no key frame */
- ffm->pts = 0; /* no pts */
- ffm->packet_ptr = ffm->packet;
- ffm->first_packet = 0;
-}
-
-/* 'first' is true if first data of a frame */
-static void ffm_write_data(AVFormatContext *s,
- const uint8_t *buf, int size,
- int64_t pts, int first)
-{
- FFMContext *ffm = s->priv_data;
- int len;
-
- if (first && ffm->frame_offset == 0)
- ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE;
- if (first && ffm->pts == 0)
- ffm->pts = pts;
-
- /* write as many packets as needed */
- while (size > 0) {
- len = ffm->packet_end - ffm->packet_ptr;
- if (len > size)
- len = size;
- memcpy(ffm->packet_ptr, buf, len);
-
- ffm->packet_ptr += len;
- buf += len;
- size -= len;
- if (ffm->packet_ptr >= ffm->packet_end) {
- /* special case : no pts in packet : we leave the current one */
- if (ffm->pts == 0)
- ffm->pts = pts;
-
- flush_packet(s);
- }
- }
-}
-
-static int ffm_write_header(AVFormatContext *s)
-{
- FFMContext *ffm = s->priv_data;
- AVStream *st;
- FFMStream *fst;
- ByteIOContext *pb = s->pb;
- AVCodecContext *codec;
- int bit_rate, i;
-
- ffm->packet_size = FFM_PACKET_SIZE;
-
- /* header */
- put_le32(pb, MKTAG('F', 'F', 'M', '1'));
- put_be32(pb, ffm->packet_size);
- /* XXX: store write position in other file ? */
- put_be64(pb, ffm->packet_size); /* current write position */
-
- put_be32(pb, s->nb_streams);
- bit_rate = 0;
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- bit_rate += st->codec->bit_rate;
- }
- put_be32(pb, bit_rate);
-
- /* list of streams */
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- fst = av_mallocz(sizeof(FFMStream));
- if (!fst)
- goto fail;
- av_set_pts_info(st, 64, 1, 1000000);
- st->priv_data = fst;
-
- codec = st->codec;
- /* generic info */
- put_be32(pb, codec->codec_id);
- put_byte(pb, codec->codec_type);
- put_be32(pb, codec->bit_rate);
- put_be32(pb, st->quality);
- put_be32(pb, codec->flags);
- put_be32(pb, codec->flags2);
- put_be32(pb, codec->debug);
- /* specific info */
- switch(codec->codec_type) {
- case CODEC_TYPE_VIDEO:
- put_be32(pb, codec->time_base.num);
- put_be32(pb, codec->time_base.den);
- put_be16(pb, codec->width);
- put_be16(pb, codec->height);
- put_be16(pb, codec->gop_size);
- put_be32(pb, codec->pix_fmt);
- put_byte(pb, codec->qmin);
- put_byte(pb, codec->qmax);
- put_byte(pb, codec->max_qdiff);
- put_be16(pb, (int) (codec->qcompress * 10000.0));
- put_be16(pb, (int) (codec->qblur * 10000.0));
- put_be32(pb, codec->bit_rate_tolerance);
- put_strz(pb, codec->rc_eq);
- put_be32(pb, codec->rc_max_rate);
- put_be32(pb, codec->rc_min_rate);
- put_be32(pb, codec->rc_buffer_size);
- put_be64(pb, av_dbl2int(codec->i_quant_factor));
- put_be64(pb, av_dbl2int(codec->b_quant_factor));
- put_be64(pb, av_dbl2int(codec->i_quant_offset));
- put_be64(pb, av_dbl2int(codec->b_quant_offset));
- put_be32(pb, codec->dct_algo);
- put_be32(pb, codec->strict_std_compliance);
- put_be32(pb, codec->max_b_frames);
- put_be32(pb, codec->luma_elim_threshold);
- put_be32(pb, codec->chroma_elim_threshold);
- put_be32(pb, codec->mpeg_quant);
- put_be32(pb, codec->intra_dc_precision);
- put_be32(pb, codec->me_method);
- put_be32(pb, codec->mb_decision);
- put_be32(pb, codec->nsse_weight);
- put_be32(pb, codec->frame_skip_cmp);
- put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity));
- put_be32(pb, codec->codec_tag);
- break;
- case CODEC_TYPE_AUDIO:
- put_be32(pb, codec->sample_rate);
- put_le16(pb, codec->channels);
- put_le16(pb, codec->frame_size);
- break;
- default:
- return -1;
- }
- /* hack to have real time */
- if (ffm_nopts)
- fst->pts = 0;
- else
- fst->pts = av_gettime();
- }
-
- /* flush until end of block reached */
- while ((url_ftell(pb) % ffm->packet_size) != 0)
- put_byte(pb, 0);
-
- put_flush_packet(pb);
-
- /* init packet mux */
- ffm->packet_ptr = ffm->packet;
- ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
- assert(ffm->packet_end >= ffm->packet);
- ffm->frame_offset = 0;
- ffm->pts = 0;
- ffm->first_packet = 1;
-
- return 0;
- fail:
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- av_freep(&st->priv_data);
- }
- return -1;
-}
-
-static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- AVStream *st = s->streams[pkt->stream_index];
- FFMStream *fst = st->priv_data;
- int64_t pts;
- uint8_t header[FRAME_HEADER_SIZE];
-
- pts = fst->pts;
- /* packet size & key_frame */
- header[0] = pkt->stream_index;
- header[1] = 0;
- if (pkt->flags & PKT_FLAG_KEY)
- header[1] |= FLAG_KEY_FRAME;
- AV_WB24(header+2, pkt->size);
- AV_WB24(header+5, pkt->duration);
- ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1);
- ffm_write_data(s, pkt->data, pkt->size, pts, 0);
-
- fst->pts += pkt->duration;
- return 0;
-}
-
-static int ffm_write_trailer(AVFormatContext *s)
-{
- ByteIOContext *pb = s->pb;
- FFMContext *ffm = s->priv_data;
-
- /* flush packets */
- if (ffm->packet_ptr > ffm->packet)
- flush_packet(s);
-
- put_flush_packet(pb);
-
- if (!url_is_streamed(pb)) {
- int64_t size;
- /* update the write offset */
- size = url_ftell(pb);
- url_fseek(pb, 8, SEEK_SET);
- put_be64(pb, size);
- put_flush_packet(pb);
- }
-
- return 0;
-}
-#endif //CONFIG_MUXERS
-
-/* ffm demux */
-
-static int ffm_is_avail_data(AVFormatContext *s, int size)
-{
- FFMContext *ffm = s->priv_data;
- offset_t pos, avail_size;
- int len;
-
- len = ffm->packet_end - ffm->packet_ptr;
- if (size <= len)
- return 1;
- pos = url_ftell(s->pb);
- if (pos == ffm->write_index) {
- /* exactly at the end of stream */
- return 0;
- } else if (pos < ffm->write_index) {
- avail_size = ffm->write_index - pos;
- } else {
- avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
- }
- avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
- if (size <= avail_size)
- return 1;
- else
- return 0;
-}
-
-/* first is true if we read the frame header */
-static int ffm_read_data(AVFormatContext *s,
- uint8_t *buf, int size, int first)
-{
- FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- int len, fill_size, size1, frame_offset;
-
- size1 = size;
- while (size > 0) {
- redo:
- len = ffm->packet_end - ffm->packet_ptr;
- if (len > size)
- len = size;
- if (len == 0) {
- if (url_ftell(pb) == ffm->file_size)
- url_fseek(pb, ffm->packet_size, SEEK_SET);
- retry_read:
- get_be16(pb); /* PACKET_ID */
- fill_size = get_be16(pb);
- ffm->pts = get_be64(pb);
- ffm->first_frame_in_packet = 1;
- frame_offset = get_be16(pb);
- get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
- ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
- if (ffm->packet_end < ffm->packet)
- return -1;
- /* if first packet or resynchronization packet, we must
- handle it specifically */
- if (ffm->first_packet || (frame_offset & 0x8000)) {
- if (!frame_offset) {
- /* This packet has no frame headers in it */
- if (url_ftell(pb) >= ffm->packet_size * 3) {
- url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR);
- goto retry_read;
- }
- /* This is bad, we cannot find a valid frame header */
- return 0;
- }
- ffm->first_packet = 0;
- if ((frame_offset & 0x7ffff) < FFM_HEADER_SIZE)
- return -1;
- ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
- if (!first)
- break;
- } else {
- ffm->packet_ptr = ffm->packet;
- }
- goto redo;
- }
- memcpy(buf, ffm->packet_ptr, len);
- buf += len;
- ffm->packet_ptr += len;
- size -= len;
- first = 0;
- }
- return size1 - size;
-}
-
-
-static void adjust_write_index(AVFormatContext *s)
-{
- FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- int64_t pts;
- //offset_t orig_write_index = ffm->write_index;
- offset_t pos_min, pos_max;
- int64_t pts_start;
- offset_t ptr = url_ftell(pb);
-
-
- pos_min = 0;
- pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
-
- pts_start = get_pts(s, pos_min);
-
- pts = get_pts(s, pos_max);
-
- if (pts - 100000 > pts_start)
- goto end;
-
- ffm->write_index = FFM_PACKET_SIZE;
-
- pts_start = get_pts(s, pos_min);
-
- pts = get_pts(s, pos_max);
-
- if (pts - 100000 <= pts_start) {
- while (1) {
- offset_t newpos;
- int64_t newpts;
-
- newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
-
- if (newpos == pos_min)
- break;
-
- newpts = get_pts(s, newpos);
-
- if (newpts - 100000 <= pts) {
- pos_max = newpos;
- pts = newpts;
- } else {
- pos_min = newpos;
- }
- }
- ffm->write_index += pos_max;
- }
-
- //printf("Adjusted write index from %"PRId64" to %"PRId64": pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.);
- //printf("pts range %0.6f - %0.6f\n", get_pts(s, 0) / 1000000. , get_pts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
-
- end:
- url_fseek(pb, ptr, SEEK_SET);
-}
-
-
-static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- FFMContext *ffm = s->priv_data;
- AVStream *st;
- FFMStream *fst;
- ByteIOContext *pb = s->pb;
- AVCodecContext *codec;
- int i, nb_streams;
- uint32_t tag;
-
- /* header */
- tag = get_le32(pb);
- if (tag != MKTAG('F', 'F', 'M', '1'))
- goto fail;
- ffm->packet_size = get_be32(pb);
- if (ffm->packet_size != FFM_PACKET_SIZE)
- goto fail;
- ffm->write_index = get_be64(pb);
- /* get also filesize */
- if (!url_is_streamed(pb)) {
- ffm->file_size = url_fsize(pb);
- adjust_write_index(s);
- } else {
- ffm->file_size = (UINT64_C(1) << 63) - 1;
- }
-
- nb_streams = get_be32(pb);
- get_be32(pb); /* total bitrate */
- /* read each stream */
- for(i=0;i<nb_streams;i++) {
- char rc_eq_buf[128];
-
- st = av_new_stream(s, 0);
- if (!st)
- goto fail;
- fst = av_mallocz(sizeof(FFMStream));
- if (!fst)
- goto fail;
- s->streams[i] = st;
-
- av_set_pts_info(st, 64, 1, 1000000);
-
- st->priv_data = fst;
-
- codec = st->codec;
- /* generic info */
- codec->codec_id = get_be32(pb);
- codec->codec_type = get_byte(pb); /* codec_type */
- codec->bit_rate = get_be32(pb);
- st->quality = get_be32(pb);
- codec->flags = get_be32(pb);
- codec->flags2 = get_be32(pb);
- codec->debug = get_be32(pb);
- /* specific info */
- switch(codec->codec_type) {
- case CODEC_TYPE_VIDEO:
- codec->time_base.num = get_be32(pb);
- codec->time_base.den = get_be32(pb);
- codec->width = get_be16(pb);
- codec->height = get_be16(pb);
- codec->gop_size = get_be16(pb);
- codec->pix_fmt = get_be32(pb);
- codec->qmin = get_byte(pb);
- codec->qmax = get_byte(pb);
- codec->max_qdiff = get_byte(pb);
- codec->qcompress = get_be16(pb) / 10000.0;
- codec->qblur = get_be16(pb) / 10000.0;
- codec->bit_rate_tolerance = get_be32(pb);
- codec->rc_eq = av_strdup(get_strz(pb, rc_eq_buf, sizeof(rc_eq_buf)));
- codec->rc_max_rate = get_be32(pb);
- codec->rc_min_rate = get_be32(pb);
- codec->rc_buffer_size = get_be32(pb);
- codec->i_quant_factor = av_int2dbl(get_be64(pb));
- codec->b_quant_factor = av_int2dbl(get_be64(pb));
- codec->i_quant_offset = av_int2dbl(get_be64(pb));
- codec->b_quant_offset = av_int2dbl(get_be64(pb));
- codec->dct_algo = get_be32(pb);
- codec->strict_std_compliance = get_be32(pb);
- codec->max_b_frames = get_be32(pb);
- codec->luma_elim_threshold = get_be32(pb);
- codec->chroma_elim_threshold = get_be32(pb);
- codec->mpeg_quant = get_be32(pb);
- codec->intra_dc_precision = get_be32(pb);
- codec->me_method = get_be32(pb);
- codec->mb_decision = get_be32(pb);
- codec->nsse_weight = get_be32(pb);
- codec->frame_skip_cmp = get_be32(pb);
- codec->rc_buffer_aggressivity = av_int2dbl(get_be64(pb));
- codec->codec_tag = get_be32(pb);
- break;
- case CODEC_TYPE_AUDIO:
- codec->sample_rate = get_be32(pb);
- codec->channels = get_le16(pb);
- codec->frame_size = get_le16(pb);
- break;
- default:
- goto fail;
- }
-
- }
-
- /* get until end of block reached */
- while ((url_ftell(pb) % ffm->packet_size) != 0)
- get_byte(pb);
-
- /* init packet demux */
- ffm->packet_ptr = ffm->packet;
- ffm->packet_end = ffm->packet;
- ffm->frame_offset = 0;
- ffm->pts = 0;
- ffm->read_state = READ_HEADER;
- ffm->first_packet = 1;
- return 0;
- fail:
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- if (st) {
- av_freep(&st->priv_data);
- av_free(st);
- }
- }
- return -1;
-}
-
-/* return < 0 if eof */
-static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- int size;
- FFMContext *ffm = s->priv_data;
- int duration;
-
- switch(ffm->read_state) {
- case READ_HEADER:
- if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
- return AVERROR(EAGAIN);
- }
-#if 0
- printf("pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
- url_ftell(s->pb), s->pb.pos, ffm->write_index, ffm->file_size);
-#endif
- if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
- FRAME_HEADER_SIZE)
- return AVERROR(EAGAIN);
-#if 0
- {
- int i;
- for(i=0;i<FRAME_HEADER_SIZE;i++)
- printf("%02x ", ffm->header[i]);
- printf("\n");
- }
-#endif
- ffm->read_state = READ_DATA;
- /* fall thru */
- case READ_DATA:
- size = AV_RB24(ffm->header + 2);
- if (!ffm_is_avail_data(s, size)) {
- return AVERROR(EAGAIN);
- }
-
- duration = AV_RB24(ffm->header + 5);
-
- av_new_packet(pkt, size);
- pkt->stream_index = ffm->header[0];
- if ((unsigned)pkt->stream_index >= s->nb_streams) {
- av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
- av_free_packet(pkt);
- ffm->read_state = READ_HEADER;
- return AVERROR(EAGAIN);
- }
- pkt->pos = url_ftell(s->pb);
- if (ffm->header[1] & FLAG_KEY_FRAME)
- pkt->flags |= PKT_FLAG_KEY;
-
- ffm->read_state = READ_HEADER;
- if (ffm_read_data(s, pkt->data, size, 0) != size) {
- /* bad case: desynchronized packet. we cancel all the packet loading */
- av_free_packet(pkt);
- return AVERROR(EAGAIN);
- }
- if (ffm->first_frame_in_packet)
- {
- pkt->pts = ffm->pts;
- ffm->first_frame_in_packet = 0;
- }
- pkt->duration = duration;
- break;
- }
- return 0;
-}
-
-//#define DEBUG_SEEK
-
-/* pos is between 0 and file_size - FFM_PACKET_SIZE. It is translated
- by the write position inside this function */
-static void ffm_seek1(AVFormatContext *s, offset_t pos1)
-{
- FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- offset_t pos;
-
- pos = pos1 + ffm->write_index;
- if (pos >= ffm->file_size)
- pos -= (ffm->file_size - FFM_PACKET_SIZE);
-#ifdef DEBUG_SEEK
- printf("seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
-#endif
- url_fseek(pb, pos, SEEK_SET);
-}
-
-static int64_t get_pts(AVFormatContext *s, offset_t pos)
-{
- ByteIOContext *pb = s->pb;
- int64_t pts;
-
- ffm_seek1(s, pos);
- url_fskip(pb, 4);
- pts = get_be64(pb);
-#ifdef DEBUG_SEEK
- printf("pts=%0.6f\n", pts / 1000000.0);
-#endif
- return pts;
-}
-
-/* seek to a given time in the file. The file read pointer is
- positioned at or before pts. XXX: the following code is quite
- approximative */
-static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
-{
- FFMContext *ffm = s->priv_data;
- offset_t pos_min, pos_max, pos;
- int64_t pts_min, pts_max, pts;
- double pos1;
-
-#ifdef DEBUG_SEEK
- printf("wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
-#endif
- /* find the position using linear interpolation (better than
- dichotomy in typical cases) */
- pos_min = 0;
- pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
- while (pos_min <= pos_max) {
- pts_min = get_pts(s, pos_min);
- pts_max = get_pts(s, pos_max);
- /* linear interpolation */
- pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
- (double)(pts_max - pts_min);
- pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
- if (pos <= pos_min)
- pos = pos_min;
- else if (pos >= pos_max)
- pos = pos_max;
- pts = get_pts(s, pos);
- /* check if we are lucky */
- if (pts == wanted_pts) {
- goto found;
- } else if (pts > wanted_pts) {
- pos_max = pos - FFM_PACKET_SIZE;
- } else {
- pos_min = pos + FFM_PACKET_SIZE;
- }
- }
- pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
- if (pos > 0)
- pos -= FFM_PACKET_SIZE;
- found:
- ffm_seek1(s, pos);
- return 0;
-}
-
-#ifdef CONFIG_FFSERVER
-offset_t ffm_read_write_index(int fd)
-{
- uint8_t buf[8];
-
- lseek(fd, 8, SEEK_SET);
- read(fd, buf, 8);
- return AV_RB64(buf);
-}
-
-void ffm_write_write_index(int fd, offset_t pos)
-{
- uint8_t buf[8];
- int i;
-
- for(i=0;i<8;i++)
- buf[i] = (pos >> (56 - i * 8)) & 0xff;
- lseek(fd, 8, SEEK_SET);
- write(fd, buf, 8);
-}
-
-void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size)
-{
- FFMContext *ffm = s->priv_data;
- ffm->write_index = pos;
- ffm->file_size = file_size;
-}
-#endif // CONFIG_FFSERVER
-
-static int ffm_read_close(AVFormatContext *s)
-{
- AVStream *st;
- int i;
-
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- av_freep(&st->priv_data);
- }
- return 0;
-}
-
-static int ffm_probe(AVProbeData *p)
-{
- if (
- p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
- p->buf[3] == '1')
- return AVPROBE_SCORE_MAX + 1;
- return 0;
-}
-
-#ifdef CONFIG_FFM_DEMUXER
-AVInputFormat ffm_demuxer = {
- "ffm",
- "ffm format",
- sizeof(FFMContext),
- ffm_probe,
- ffm_read_header,
- ffm_read_packet,
- ffm_read_close,
- ffm_seek,
-};
-#endif
-#ifdef CONFIG_FFM_MUXER
-AVOutputFormat ffm_muxer = {
- "ffm",
- "ffm format",
- "",
- "ffm",
- sizeof(FFMContext),
- /* not really used */
- CODEC_ID_MP2,
- CODEC_ID_MPEG1VIDEO,
- ffm_write_header,
- ffm_write_packet,
- ffm_write_trailer,
-};
-#endif //CONFIG_FFM_MUXER
+#endif /* FFMPEG_FFM_H */
Copied: trunk/libavformat/ffmdec.c (from r13412, /trunk/libavformat/ffm.c)
==============================================================================
--- /trunk/libavformat/ffm.c (original)
+++ trunk/libavformat/ffmdec.c Mon May 26 05:44:31 2008
@@ -1,5 +1,5 @@
/*
- * FFM (ffserver live feed) muxer and demuxer
+ * FFM (ffserver live feed) demuxer
* Copyright (c) 2001 Fabrice Bellard.
*
* This file is part of FFmpeg.
@@ -18,277 +18,13 @@
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
#include "avformat.h"
+#include "ffm.h"
#include <unistd.h>
-/* The FFM file is made of blocks of fixed size */
-#define FFM_HEADER_SIZE 14
-#define PACKET_ID 0x666d
-
-/* each packet contains frames (which can span several packets */
-#define FRAME_HEADER_SIZE 8
-#define FLAG_KEY_FRAME 0x01
-
-typedef struct FFMStream {
- int64_t pts;
-} FFMStream;
-
-enum {
- READ_HEADER,
- READ_DATA,
-};
-
-typedef struct FFMContext {
- /* only reading mode */
- offset_t write_index, file_size;
- int read_state;
- uint8_t header[FRAME_HEADER_SIZE];
-
- /* read and write */
- int first_packet; /* true if first packet, needed to set the discontinuity tag */
- int first_frame_in_packet; /* true if first frame in packet, needed to know if PTS information is valid */
- int packet_size;
- int frame_offset;
- int64_t pts;
- uint8_t *packet_ptr, *packet_end;
- uint8_t packet[FFM_PACKET_SIZE];
-} FFMContext;
-
static int64_t get_pts(AVFormatContext *s, offset_t pos);
-/* disable pts hack for testing */
-int ffm_nopts = 0;
-
-#ifdef CONFIG_MUXERS
-static void flush_packet(AVFormatContext *s)
-{
- FFMContext *ffm = s->priv_data;
- int fill_size, h;
- ByteIOContext *pb = s->pb;
-
- fill_size = ffm->packet_end - ffm->packet_ptr;
- memset(ffm->packet_ptr, 0, fill_size);
-
- if (url_ftell(pb) % ffm->packet_size)
- av_abort();
-
- /* put header */
- put_be16(pb, PACKET_ID);
- put_be16(pb, fill_size);
- put_be64(pb, ffm->pts);
- h = ffm->frame_offset;
- if (ffm->first_packet)
- h |= 0x8000;
- put_be16(pb, h);
- put_buffer(pb, ffm->packet, ffm->packet_end - ffm->packet);
- put_flush_packet(pb);
-
- /* prepare next packet */
- ffm->frame_offset = 0; /* no key frame */
- ffm->pts = 0; /* no pts */
- ffm->packet_ptr = ffm->packet;
- ffm->first_packet = 0;
-}
-
-/* 'first' is true if first data of a frame */
-static void ffm_write_data(AVFormatContext *s,
- const uint8_t *buf, int size,
- int64_t pts, int first)
-{
- FFMContext *ffm = s->priv_data;
- int len;
-
- if (first && ffm->frame_offset == 0)
- ffm->frame_offset = ffm->packet_ptr - ffm->packet + FFM_HEADER_SIZE;
- if (first && ffm->pts == 0)
- ffm->pts = pts;
-
- /* write as many packets as needed */
- while (size > 0) {
- len = ffm->packet_end - ffm->packet_ptr;
- if (len > size)
- len = size;
- memcpy(ffm->packet_ptr, buf, len);
-
- ffm->packet_ptr += len;
- buf += len;
- size -= len;
- if (ffm->packet_ptr >= ffm->packet_end) {
- /* special case : no pts in packet : we leave the current one */
- if (ffm->pts == 0)
- ffm->pts = pts;
-
- flush_packet(s);
- }
- }
-}
-
-static int ffm_write_header(AVFormatContext *s)
-{
- FFMContext *ffm = s->priv_data;
- AVStream *st;
- FFMStream *fst;
- ByteIOContext *pb = s->pb;
- AVCodecContext *codec;
- int bit_rate, i;
-
- ffm->packet_size = FFM_PACKET_SIZE;
-
- /* header */
- put_le32(pb, MKTAG('F', 'F', 'M', '1'));
- put_be32(pb, ffm->packet_size);
- /* XXX: store write position in other file ? */
- put_be64(pb, ffm->packet_size); /* current write position */
-
- put_be32(pb, s->nb_streams);
- bit_rate = 0;
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- bit_rate += st->codec->bit_rate;
- }
- put_be32(pb, bit_rate);
-
- /* list of streams */
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- fst = av_mallocz(sizeof(FFMStream));
- if (!fst)
- goto fail;
- av_set_pts_info(st, 64, 1, 1000000);
- st->priv_data = fst;
-
- codec = st->codec;
- /* generic info */
- put_be32(pb, codec->codec_id);
- put_byte(pb, codec->codec_type);
- put_be32(pb, codec->bit_rate);
- put_be32(pb, st->quality);
- put_be32(pb, codec->flags);
- put_be32(pb, codec->flags2);
- put_be32(pb, codec->debug);
- /* specific info */
- switch(codec->codec_type) {
- case CODEC_TYPE_VIDEO:
- put_be32(pb, codec->time_base.num);
- put_be32(pb, codec->time_base.den);
- put_be16(pb, codec->width);
- put_be16(pb, codec->height);
- put_be16(pb, codec->gop_size);
- put_be32(pb, codec->pix_fmt);
- put_byte(pb, codec->qmin);
- put_byte(pb, codec->qmax);
- put_byte(pb, codec->max_qdiff);
- put_be16(pb, (int) (codec->qcompress * 10000.0));
- put_be16(pb, (int) (codec->qblur * 10000.0));
- put_be32(pb, codec->bit_rate_tolerance);
- put_strz(pb, codec->rc_eq);
- put_be32(pb, codec->rc_max_rate);
- put_be32(pb, codec->rc_min_rate);
- put_be32(pb, codec->rc_buffer_size);
- put_be64(pb, av_dbl2int(codec->i_quant_factor));
- put_be64(pb, av_dbl2int(codec->b_quant_factor));
- put_be64(pb, av_dbl2int(codec->i_quant_offset));
- put_be64(pb, av_dbl2int(codec->b_quant_offset));
- put_be32(pb, codec->dct_algo);
- put_be32(pb, codec->strict_std_compliance);
- put_be32(pb, codec->max_b_frames);
- put_be32(pb, codec->luma_elim_threshold);
- put_be32(pb, codec->chroma_elim_threshold);
- put_be32(pb, codec->mpeg_quant);
- put_be32(pb, codec->intra_dc_precision);
- put_be32(pb, codec->me_method);
- put_be32(pb, codec->mb_decision);
- put_be32(pb, codec->nsse_weight);
- put_be32(pb, codec->frame_skip_cmp);
- put_be64(pb, av_dbl2int(codec->rc_buffer_aggressivity));
- put_be32(pb, codec->codec_tag);
- break;
- case CODEC_TYPE_AUDIO:
- put_be32(pb, codec->sample_rate);
- put_le16(pb, codec->channels);
- put_le16(pb, codec->frame_size);
- break;
- default:
- return -1;
- }
- /* hack to have real time */
- if (ffm_nopts)
- fst->pts = 0;
- else
- fst->pts = av_gettime();
- }
-
- /* flush until end of block reached */
- while ((url_ftell(pb) % ffm->packet_size) != 0)
- put_byte(pb, 0);
-
- put_flush_packet(pb);
-
- /* init packet mux */
- ffm->packet_ptr = ffm->packet;
- ffm->packet_end = ffm->packet + ffm->packet_size - FFM_HEADER_SIZE;
- assert(ffm->packet_end >= ffm->packet);
- ffm->frame_offset = 0;
- ffm->pts = 0;
- ffm->first_packet = 1;
-
- return 0;
- fail:
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- av_freep(&st->priv_data);
- }
- return -1;
-}
-
-static int ffm_write_packet(AVFormatContext *s, AVPacket *pkt)
-{
- AVStream *st = s->streams[pkt->stream_index];
- FFMStream *fst = st->priv_data;
- int64_t pts;
- uint8_t header[FRAME_HEADER_SIZE];
-
- pts = fst->pts;
- /* packet size & key_frame */
- header[0] = pkt->stream_index;
- header[1] = 0;
- if (pkt->flags & PKT_FLAG_KEY)
- header[1] |= FLAG_KEY_FRAME;
- AV_WB24(header+2, pkt->size);
- AV_WB24(header+5, pkt->duration);
- ffm_write_data(s, header, FRAME_HEADER_SIZE, pts, 1);
- ffm_write_data(s, pkt->data, pkt->size, pts, 0);
-
- fst->pts += pkt->duration;
- return 0;
-}
-
-static int ffm_write_trailer(AVFormatContext *s)
-{
- ByteIOContext *pb = s->pb;
- FFMContext *ffm = s->priv_data;
-
- /* flush packets */
- if (ffm->packet_ptr > ffm->packet)
- flush_packet(s);
-
- put_flush_packet(pb);
-
- if (!url_is_streamed(pb)) {
- int64_t size;
- /* update the write offset */
- size = url_ftell(pb);
- url_fseek(pb, 8, SEEK_SET);
- put_be64(pb, size);
- put_flush_packet(pb);
- }
-
- return 0;
-}
-#endif //CONFIG_MUXERS
-
-/* ffm demux */
-
static int ffm_is_avail_data(AVFormatContext *s, int size)
{
FFMContext *ffm = s->priv_data;
@@ -750,7 +486,6 @@ static int ffm_probe(AVProbeData *p)
return 0;
}
-#ifdef CONFIG_FFM_DEMUXER
AVInputFormat ffm_demuxer = {
"ffm",
"ffm format",
@@ -761,19 +496,3 @@ AVInputFormat ffm_demuxer = {
ffm_read_close,
ffm_seek,
};
-#endif
-#ifdef CONFIG_FFM_MUXER
-AVOutputFormat ffm_muxer = {
- "ffm",
- "ffm format",
- "",
- "ffm",
- sizeof(FFMContext),
- /* not really used */
- CODEC_ID_MP2,
- CODEC_ID_MPEG1VIDEO,
- ffm_write_header,
- ffm_write_packet,
- ffm_write_trailer,
-};
-#endif //CONFIG_FFM_MUXER
Copied: trunk/libavformat/ffmenc.c (from r13412, /trunk/libavformat/ffm.c)
==============================================================================
--- /trunk/libavformat/ffm.c (original)
+++ trunk/libavformat/ffmenc.c Mon May 26 05:44:31 2008
@@ -1,5 +1,5 @@
/*
- * FFM (ffserver live feed) muxer and demuxer
+ * FFM (ffserver live feed) muxer
* Copyright (c) 2001 Fabrice Bellard.
*
* This file is part of FFmpeg.
@@ -18,48 +18,14 @@
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
#include "avformat.h"
+#include "ffm.h"
#include <unistd.h>
-/* The FFM file is made of blocks of fixed size */
-#define FFM_HEADER_SIZE 14
-#define PACKET_ID 0x666d
-
-/* each packet contains frames (which can span several packets */
-#define FRAME_HEADER_SIZE 8
-#define FLAG_KEY_FRAME 0x01
-
-typedef struct FFMStream {
- int64_t pts;
-} FFMStream;
-
-enum {
- READ_HEADER,
- READ_DATA,
-};
-
-typedef struct FFMContext {
- /* only reading mode */
- offset_t write_index, file_size;
- int read_state;
- uint8_t header[FRAME_HEADER_SIZE];
-
- /* read and write */
- int first_packet; /* true if first packet, needed to set the discontinuity tag */
- int first_frame_in_packet; /* true if first frame in packet, needed to know if PTS information is valid */
- int packet_size;
- int frame_offset;
- int64_t pts;
- uint8_t *packet_ptr, *packet_end;
- uint8_t packet[FFM_PACKET_SIZE];
-} FFMContext;
-
-static int64_t get_pts(AVFormatContext *s, offset_t pos);
-
/* disable pts hack for testing */
int ffm_nopts = 0;
-#ifdef CONFIG_MUXERS
static void flush_packet(AVFormatContext *s)
{
FFMContext *ffm = s->priv_data;
@@ -285,484 +251,7 @@ static int ffm_write_trailer(AVFormatCon
return 0;
}
-#endif //CONFIG_MUXERS
-
-/* ffm demux */
-
-static int ffm_is_avail_data(AVFormatContext *s, int size)
-{
- FFMContext *ffm = s->priv_data;
- offset_t pos, avail_size;
- int len;
-
- len = ffm->packet_end - ffm->packet_ptr;
- if (size <= len)
- return 1;
- pos = url_ftell(s->pb);
- if (pos == ffm->write_index) {
- /* exactly at the end of stream */
- return 0;
- } else if (pos < ffm->write_index) {
- avail_size = ffm->write_index - pos;
- } else {
- avail_size = (ffm->file_size - pos) + (ffm->write_index - FFM_PACKET_SIZE);
- }
- avail_size = (avail_size / ffm->packet_size) * (ffm->packet_size - FFM_HEADER_SIZE) + len;
- if (size <= avail_size)
- return 1;
- else
- return 0;
-}
-
-/* first is true if we read the frame header */
-static int ffm_read_data(AVFormatContext *s,
- uint8_t *buf, int size, int first)
-{
- FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- int len, fill_size, size1, frame_offset;
-
- size1 = size;
- while (size > 0) {
- redo:
- len = ffm->packet_end - ffm->packet_ptr;
- if (len > size)
- len = size;
- if (len == 0) {
- if (url_ftell(pb) == ffm->file_size)
- url_fseek(pb, ffm->packet_size, SEEK_SET);
- retry_read:
- get_be16(pb); /* PACKET_ID */
- fill_size = get_be16(pb);
- ffm->pts = get_be64(pb);
- ffm->first_frame_in_packet = 1;
- frame_offset = get_be16(pb);
- get_buffer(pb, ffm->packet, ffm->packet_size - FFM_HEADER_SIZE);
- ffm->packet_end = ffm->packet + (ffm->packet_size - FFM_HEADER_SIZE - fill_size);
- if (ffm->packet_end < ffm->packet)
- return -1;
- /* if first packet or resynchronization packet, we must
- handle it specifically */
- if (ffm->first_packet || (frame_offset & 0x8000)) {
- if (!frame_offset) {
- /* This packet has no frame headers in it */
- if (url_ftell(pb) >= ffm->packet_size * 3) {
- url_fseek(pb, -ffm->packet_size * 2, SEEK_CUR);
- goto retry_read;
- }
- /* This is bad, we cannot find a valid frame header */
- return 0;
- }
- ffm->first_packet = 0;
- if ((frame_offset & 0x7ffff) < FFM_HEADER_SIZE)
- return -1;
- ffm->packet_ptr = ffm->packet + (frame_offset & 0x7fff) - FFM_HEADER_SIZE;
- if (!first)
- break;
- } else {
- ffm->packet_ptr = ffm->packet;
- }
- goto redo;
- }
- memcpy(buf, ffm->packet_ptr, len);
- buf += len;
- ffm->packet_ptr += len;
- size -= len;
- first = 0;
- }
- return size1 - size;
-}
-
-
-static void adjust_write_index(AVFormatContext *s)
-{
- FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- int64_t pts;
- //offset_t orig_write_index = ffm->write_index;
- offset_t pos_min, pos_max;
- int64_t pts_start;
- offset_t ptr = url_ftell(pb);
-
-
- pos_min = 0;
- pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
-
- pts_start = get_pts(s, pos_min);
-
- pts = get_pts(s, pos_max);
-
- if (pts - 100000 > pts_start)
- goto end;
-
- ffm->write_index = FFM_PACKET_SIZE;
-
- pts_start = get_pts(s, pos_min);
-
- pts = get_pts(s, pos_max);
-
- if (pts - 100000 <= pts_start) {
- while (1) {
- offset_t newpos;
- int64_t newpts;
-
- newpos = ((pos_max + pos_min) / (2 * FFM_PACKET_SIZE)) * FFM_PACKET_SIZE;
-
- if (newpos == pos_min)
- break;
-
- newpts = get_pts(s, newpos);
-
- if (newpts - 100000 <= pts) {
- pos_max = newpos;
- pts = newpts;
- } else {
- pos_min = newpos;
- }
- }
- ffm->write_index += pos_max;
- }
-
- //printf("Adjusted write index from %"PRId64" to %"PRId64": pts=%0.6f\n", orig_write_index, ffm->write_index, pts / 1000000.);
- //printf("pts range %0.6f - %0.6f\n", get_pts(s, 0) / 1000000. , get_pts(s, ffm->file_size - 2 * FFM_PACKET_SIZE) / 1000000. );
-
- end:
- url_fseek(pb, ptr, SEEK_SET);
-}
-
-
-static int ffm_read_header(AVFormatContext *s, AVFormatParameters *ap)
-{
- FFMContext *ffm = s->priv_data;
- AVStream *st;
- FFMStream *fst;
- ByteIOContext *pb = s->pb;
- AVCodecContext *codec;
- int i, nb_streams;
- uint32_t tag;
-
- /* header */
- tag = get_le32(pb);
- if (tag != MKTAG('F', 'F', 'M', '1'))
- goto fail;
- ffm->packet_size = get_be32(pb);
- if (ffm->packet_size != FFM_PACKET_SIZE)
- goto fail;
- ffm->write_index = get_be64(pb);
- /* get also filesize */
- if (!url_is_streamed(pb)) {
- ffm->file_size = url_fsize(pb);
- adjust_write_index(s);
- } else {
- ffm->file_size = (UINT64_C(1) << 63) - 1;
- }
-
- nb_streams = get_be32(pb);
- get_be32(pb); /* total bitrate */
- /* read each stream */
- for(i=0;i<nb_streams;i++) {
- char rc_eq_buf[128];
-
- st = av_new_stream(s, 0);
- if (!st)
- goto fail;
- fst = av_mallocz(sizeof(FFMStream));
- if (!fst)
- goto fail;
- s->streams[i] = st;
-
- av_set_pts_info(st, 64, 1, 1000000);
-
- st->priv_data = fst;
-
- codec = st->codec;
- /* generic info */
- codec->codec_id = get_be32(pb);
- codec->codec_type = get_byte(pb); /* codec_type */
- codec->bit_rate = get_be32(pb);
- st->quality = get_be32(pb);
- codec->flags = get_be32(pb);
- codec->flags2 = get_be32(pb);
- codec->debug = get_be32(pb);
- /* specific info */
- switch(codec->codec_type) {
- case CODEC_TYPE_VIDEO:
- codec->time_base.num = get_be32(pb);
- codec->time_base.den = get_be32(pb);
- codec->width = get_be16(pb);
- codec->height = get_be16(pb);
- codec->gop_size = get_be16(pb);
- codec->pix_fmt = get_be32(pb);
- codec->qmin = get_byte(pb);
- codec->qmax = get_byte(pb);
- codec->max_qdiff = get_byte(pb);
- codec->qcompress = get_be16(pb) / 10000.0;
- codec->qblur = get_be16(pb) / 10000.0;
- codec->bit_rate_tolerance = get_be32(pb);
- codec->rc_eq = av_strdup(get_strz(pb, rc_eq_buf, sizeof(rc_eq_buf)));
- codec->rc_max_rate = get_be32(pb);
- codec->rc_min_rate = get_be32(pb);
- codec->rc_buffer_size = get_be32(pb);
- codec->i_quant_factor = av_int2dbl(get_be64(pb));
- codec->b_quant_factor = av_int2dbl(get_be64(pb));
- codec->i_quant_offset = av_int2dbl(get_be64(pb));
- codec->b_quant_offset = av_int2dbl(get_be64(pb));
- codec->dct_algo = get_be32(pb);
- codec->strict_std_compliance = get_be32(pb);
- codec->max_b_frames = get_be32(pb);
- codec->luma_elim_threshold = get_be32(pb);
- codec->chroma_elim_threshold = get_be32(pb);
- codec->mpeg_quant = get_be32(pb);
- codec->intra_dc_precision = get_be32(pb);
- codec->me_method = get_be32(pb);
- codec->mb_decision = get_be32(pb);
- codec->nsse_weight = get_be32(pb);
- codec->frame_skip_cmp = get_be32(pb);
- codec->rc_buffer_aggressivity = av_int2dbl(get_be64(pb));
- codec->codec_tag = get_be32(pb);
- break;
- case CODEC_TYPE_AUDIO:
- codec->sample_rate = get_be32(pb);
- codec->channels = get_le16(pb);
- codec->frame_size = get_le16(pb);
- break;
- default:
- goto fail;
- }
-
- }
-
- /* get until end of block reached */
- while ((url_ftell(pb) % ffm->packet_size) != 0)
- get_byte(pb);
-
- /* init packet demux */
- ffm->packet_ptr = ffm->packet;
- ffm->packet_end = ffm->packet;
- ffm->frame_offset = 0;
- ffm->pts = 0;
- ffm->read_state = READ_HEADER;
- ffm->first_packet = 1;
- return 0;
- fail:
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- if (st) {
- av_freep(&st->priv_data);
- av_free(st);
- }
- }
- return -1;
-}
-
-/* return < 0 if eof */
-static int ffm_read_packet(AVFormatContext *s, AVPacket *pkt)
-{
- int size;
- FFMContext *ffm = s->priv_data;
- int duration;
-
- switch(ffm->read_state) {
- case READ_HEADER:
- if (!ffm_is_avail_data(s, FRAME_HEADER_SIZE)) {
- return AVERROR(EAGAIN);
- }
-#if 0
- printf("pos=%08"PRIx64" spos=%"PRIx64", write_index=%"PRIx64" size=%"PRIx64"\n",
- url_ftell(s->pb), s->pb.pos, ffm->write_index, ffm->file_size);
-#endif
- if (ffm_read_data(s, ffm->header, FRAME_HEADER_SIZE, 1) !=
- FRAME_HEADER_SIZE)
- return AVERROR(EAGAIN);
-#if 0
- {
- int i;
- for(i=0;i<FRAME_HEADER_SIZE;i++)
- printf("%02x ", ffm->header[i]);
- printf("\n");
- }
-#endif
- ffm->read_state = READ_DATA;
- /* fall thru */
- case READ_DATA:
- size = AV_RB24(ffm->header + 2);
- if (!ffm_is_avail_data(s, size)) {
- return AVERROR(EAGAIN);
- }
-
- duration = AV_RB24(ffm->header + 5);
-
- av_new_packet(pkt, size);
- pkt->stream_index = ffm->header[0];
- if ((unsigned)pkt->stream_index >= s->nb_streams) {
- av_log(s, AV_LOG_ERROR, "invalid stream index %d\n", pkt->stream_index);
- av_free_packet(pkt);
- ffm->read_state = READ_HEADER;
- return AVERROR(EAGAIN);
- }
- pkt->pos = url_ftell(s->pb);
- if (ffm->header[1] & FLAG_KEY_FRAME)
- pkt->flags |= PKT_FLAG_KEY;
-
- ffm->read_state = READ_HEADER;
- if (ffm_read_data(s, pkt->data, size, 0) != size) {
- /* bad case: desynchronized packet. we cancel all the packet loading */
- av_free_packet(pkt);
- return AVERROR(EAGAIN);
- }
- if (ffm->first_frame_in_packet)
- {
- pkt->pts = ffm->pts;
- ffm->first_frame_in_packet = 0;
- }
- pkt->duration = duration;
- break;
- }
- return 0;
-}
-
-//#define DEBUG_SEEK
-
-/* pos is between 0 and file_size - FFM_PACKET_SIZE. It is translated
- by the write position inside this function */
-static void ffm_seek1(AVFormatContext *s, offset_t pos1)
-{
- FFMContext *ffm = s->priv_data;
- ByteIOContext *pb = s->pb;
- offset_t pos;
- pos = pos1 + ffm->write_index;
- if (pos >= ffm->file_size)
- pos -= (ffm->file_size - FFM_PACKET_SIZE);
-#ifdef DEBUG_SEEK
- printf("seek to %"PRIx64" -> %"PRIx64"\n", pos1, pos);
-#endif
- url_fseek(pb, pos, SEEK_SET);
-}
-
-static int64_t get_pts(AVFormatContext *s, offset_t pos)
-{
- ByteIOContext *pb = s->pb;
- int64_t pts;
-
- ffm_seek1(s, pos);
- url_fskip(pb, 4);
- pts = get_be64(pb);
-#ifdef DEBUG_SEEK
- printf("pts=%0.6f\n", pts / 1000000.0);
-#endif
- return pts;
-}
-
-/* seek to a given time in the file. The file read pointer is
- positioned at or before pts. XXX: the following code is quite
- approximative */
-static int ffm_seek(AVFormatContext *s, int stream_index, int64_t wanted_pts, int flags)
-{
- FFMContext *ffm = s->priv_data;
- offset_t pos_min, pos_max, pos;
- int64_t pts_min, pts_max, pts;
- double pos1;
-
-#ifdef DEBUG_SEEK
- printf("wanted_pts=%0.6f\n", wanted_pts / 1000000.0);
-#endif
- /* find the position using linear interpolation (better than
- dichotomy in typical cases) */
- pos_min = 0;
- pos_max = ffm->file_size - 2 * FFM_PACKET_SIZE;
- while (pos_min <= pos_max) {
- pts_min = get_pts(s, pos_min);
- pts_max = get_pts(s, pos_max);
- /* linear interpolation */
- pos1 = (double)(pos_max - pos_min) * (double)(wanted_pts - pts_min) /
- (double)(pts_max - pts_min);
- pos = (((int64_t)pos1) / FFM_PACKET_SIZE) * FFM_PACKET_SIZE;
- if (pos <= pos_min)
- pos = pos_min;
- else if (pos >= pos_max)
- pos = pos_max;
- pts = get_pts(s, pos);
- /* check if we are lucky */
- if (pts == wanted_pts) {
- goto found;
- } else if (pts > wanted_pts) {
- pos_max = pos - FFM_PACKET_SIZE;
- } else {
- pos_min = pos + FFM_PACKET_SIZE;
- }
- }
- pos = (flags & AVSEEK_FLAG_BACKWARD) ? pos_min : pos_max;
- if (pos > 0)
- pos -= FFM_PACKET_SIZE;
- found:
- ffm_seek1(s, pos);
- return 0;
-}
-
-#ifdef CONFIG_FFSERVER
-offset_t ffm_read_write_index(int fd)
-{
- uint8_t buf[8];
-
- lseek(fd, 8, SEEK_SET);
- read(fd, buf, 8);
- return AV_RB64(buf);
-}
-
-void ffm_write_write_index(int fd, offset_t pos)
-{
- uint8_t buf[8];
- int i;
-
- for(i=0;i<8;i++)
- buf[i] = (pos >> (56 - i * 8)) & 0xff;
- lseek(fd, 8, SEEK_SET);
- write(fd, buf, 8);
-}
-
-void ffm_set_write_index(AVFormatContext *s, offset_t pos, offset_t file_size)
-{
- FFMContext *ffm = s->priv_data;
- ffm->write_index = pos;
- ffm->file_size = file_size;
-}
-#endif // CONFIG_FFSERVER
-
-static int ffm_read_close(AVFormatContext *s)
-{
- AVStream *st;
- int i;
-
- for(i=0;i<s->nb_streams;i++) {
- st = s->streams[i];
- av_freep(&st->priv_data);
- }
- return 0;
-}
-
-static int ffm_probe(AVProbeData *p)
-{
- if (
- p->buf[0] == 'F' && p->buf[1] == 'F' && p->buf[2] == 'M' &&
- p->buf[3] == '1')
- return AVPROBE_SCORE_MAX + 1;
- return 0;
-}
-
-#ifdef CONFIG_FFM_DEMUXER
-AVInputFormat ffm_demuxer = {
- "ffm",
- "ffm format",
- sizeof(FFMContext),
- ffm_probe,
- ffm_read_header,
- ffm_read_packet,
- ffm_read_close,
- ffm_seek,
-};
-#endif
-#ifdef CONFIG_FFM_MUXER
AVOutputFormat ffm_muxer = {
"ffm",
"ffm format",
@@ -776,4 +265,3 @@ AVOutputFormat ffm_muxer = {
ffm_write_packet,
ffm_write_trailer,
};
-#endif //CONFIG_FFM_MUXER
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