[FFmpeg-devel] [PATCH 1/3] rename spdif.c to spdifenc.c
Anssi Hannula
anssi.hannula
Sat Nov 6 13:27:24 CET 2010
---
libavformat/Makefile | 2 +-
libavformat/spdif.c | 313 ------------------------------------------------
libavformat/spdifenc.c | 313 ++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 314 insertions(+), 314 deletions(-)
delete mode 100644 libavformat/spdif.c
create mode 100644 libavformat/spdifenc.c
diff --git a/libavformat/Makefile b/libavformat/Makefile
index e62a5ea..1519689 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -256,7 +256,7 @@ OBJS-$(CONFIG_SMACKER_DEMUXER) += smacker.o
OBJS-$(CONFIG_SOL_DEMUXER) += sol.o pcm.o
OBJS-$(CONFIG_SOX_DEMUXER) += soxdec.o pcm.o
OBJS-$(CONFIG_SOX_MUXER) += soxenc.o
-OBJS-$(CONFIG_SPDIF_MUXER) += spdif.o
+OBJS-$(CONFIG_SPDIF_MUXER) += spdifenc.o
OBJS-$(CONFIG_SRT_DEMUXER) += srtdec.o
OBJS-$(CONFIG_SRT_MUXER) += rawenc.o
OBJS-$(CONFIG_STR_DEMUXER) += psxstr.o
diff --git a/libavformat/spdif.c b/libavformat/spdif.c
deleted file mode 100644
index ac84c50..0000000
--- a/libavformat/spdif.c
+++ /dev/null
@@ -1,313 +0,0 @@
-/*
- * IEC958 muxer
- * Copyright (c) 2009 Bartlomiej Wolowiec
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * IEC-61937 encapsulation of various formats, used by S/PDIF
- * @author Bartlomiej Wolowiec
- */
-
-/*
- * Terminology used in specification:
- * data-burst - IEC958 frame, contains header and encapsuled frame
- * burst-preambule - IEC958 frame header, contains 16-bits words named Pa, Pb, Pc and Pd
- * burst-payload - encapsuled frame
- * Pa, Pb - syncword - 0xF872, 0x4E1F
- * Pc - burst-info, contains data-type (bits 0-6), error flag (bit 7), data-type-dependent info (bits 8-12)
- * and bitstream number (bits 13-15)
- * data-type - determines type of encapsuled frames
- * Pd - length code (number of bits or bytes of encapsuled frame - according to data_type)
- *
- * IEC958 frames at normal usage start every specific count of bytes,
- * dependent from data-type (spaces between packets are filled by zeros)
- */
-
-#include "avformat.h"
-#include "libavcodec/ac3.h"
-#include "libavcodec/dca.h"
-#include "libavcodec/aacadtsdec.h"
-
-#define SYNCWORD1 0xF872
-#define SYNCWORD2 0x4E1F
-#define BURST_HEADER_SIZE 0x8
-
-enum IEC958DataType {
- IEC958_AC3 = 0x01, ///< AC-3 data
- IEC958_MPEG1_LAYER1 = 0x04, ///< MPEG-1 layer 1
- IEC958_MPEG1_LAYER23 = 0x05, ///< MPEG-1 layer 2 or 3 data or MPEG-2 without extension
- IEC958_MPEG2_EXT = 0x06, ///< MPEG-2 data with extension
- IEC958_MPEG2_AAC = 0x07, ///< MPEG-2 AAC ADTS
- IEC958_MPEG2_LAYER1_LSF = 0x08, ///< MPEG-2, layer-1 low sampling frequency
- IEC958_MPEG2_LAYER2_LSF = 0x09, ///< MPEG-2, layer-2 low sampling frequency
- IEC958_MPEG2_LAYER3_LSF = 0x0A, ///< MPEG-2, layer-3 low sampling frequency
- IEC958_DTS1 = 0x0B, ///< DTS type I (512 samples)
- IEC958_DTS2 = 0x0C, ///< DTS type II (1024 samples)
- IEC958_DTS3 = 0x0D, ///< DTS type III (2048 samples)
- IEC958_ATRAC = 0x0E, ///< Atrac data
- IEC958_ATRAC3 = 0x0F, ///< Atrac 3 data
- IEC958_ATRACX = 0x10, ///< Atrac 3 plus data
- IEC958_DTSHD = 0x11, ///< DTS HD data
- IEC958_WMAPRO = 0x12, ///< WMA 9 Professional data
- IEC958_MPEG2_AAC_LSF_2048 = 0x13, ///< MPEG-2 AAC ADTS half-rate low sampling frequency
- IEC958_MPEG2_AAC_LSF_4096 = 0x13 | 0x20, ///< MPEG-2 AAC ADTS quarter-rate low sampling frequency
- IEC958_EAC3 = 0x15, ///< E-AC-3 data
- IEC958_TRUEHD = 0x16, ///< TrueHD data
-};
-
-typedef struct IEC958Context {
- enum IEC958DataType data_type; ///< burst info - reference to type of payload of the data-burst
- int pkt_size; ///< length code in bits
- int pkt_offset; ///< data burst repetition period in bytes
- uint8_t *buffer; ///< allocated buffer, used for swap bytes
- int buffer_size; ///< size of allocated buffer
-
- /// function, which generates codec dependent header information.
- /// Sets data_type and data_offset
- int (*header_info) (AVFormatContext *s, AVPacket *pkt);
-} IEC958Context;
-
-//TODO move to DSP
-static void bswap_buf16(uint16_t *dst, const uint16_t *src, int w)
-{
- int i;
-
- for (i = 0; i + 8 <= w; i += 8) {
- dst[i + 0] = av_bswap16(src[i + 0]);
- dst[i + 1] = av_bswap16(src[i + 1]);
- dst[i + 2] = av_bswap16(src[i + 2]);
- dst[i + 3] = av_bswap16(src[i + 3]);
- dst[i + 4] = av_bswap16(src[i + 4]);
- dst[i + 5] = av_bswap16(src[i + 5]);
- dst[i + 6] = av_bswap16(src[i + 6]);
- dst[i + 7] = av_bswap16(src[i + 7]);
- }
- for (; i < w; i++)
- dst[i + 0] = av_bswap16(src[i + 0]);
-}
-
-static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- int bitstream_mode = pkt->data[6] & 0x7;
-
- ctx->data_type = IEC958_AC3 | (bitstream_mode << 8);
- ctx->pkt_offset = AC3_FRAME_SIZE << 2;
- return 0;
-}
-
-static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- uint32_t syncword_dts = AV_RB32(pkt->data);
- int blocks;
-
- switch (syncword_dts) {
- case DCA_MARKER_RAW_BE:
- blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
- break;
- case DCA_MARKER_RAW_LE:
- blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
- break;
- case DCA_MARKER_14B_BE:
- blocks =
- (((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
- break;
- case DCA_MARKER_14B_LE:
- blocks =
- (((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
- break;
- default:
- av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%x\n", syncword_dts);
- return -1;
- }
- blocks++;
- switch (blocks) {
- case 512 >> 5: ctx->data_type = IEC958_DTS1; break;
- case 1024 >> 5: ctx->data_type = IEC958_DTS2; break;
- case 2048 >> 5: ctx->data_type = IEC958_DTS3; break;
- default:
- av_log(s, AV_LOG_ERROR, "%i samples in DTS frame not supported\n",
- blocks << 5);
- return -1;
- }
- ctx->pkt_offset = blocks << 7;
-
- return 0;
-}
-
-static const enum IEC958DataType mpeg_data_type[2][3] = {
- // LAYER1 LAYER2 LAYER3
- { IEC958_MPEG2_LAYER1_LSF, IEC958_MPEG2_LAYER2_LSF, IEC958_MPEG2_LAYER3_LSF }, //MPEG2 LSF
- { IEC958_MPEG1_LAYER1, IEC958_MPEG1_LAYER23, IEC958_MPEG1_LAYER23 }, //MPEG1
-};
-
-static const uint16_t mpeg_pkt_offset[2][3] = {
- //LAYER1 LAYER2 LAYER3
- { 3072, 9216, 4608 }, // MPEG2 LSF
- { 1536, 4608, 4608 }, // MPEG1
-};
-
-static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- int version = (pkt->data[1] >> 3) & 3;
- int layer = 3 - ((pkt->data[1] >> 1) & 3);
- int extension = pkt->data[2] & 1;
-
- if (layer == 3 || version == 1) {
- av_log(s, AV_LOG_ERROR, "Wrong MPEG file format\n");
- return -1;
- }
- av_log(s, AV_LOG_DEBUG, "version: %i layer: %i extension: %i\n", version, layer, extension);
- if (version == 2 && extension) {
- ctx->data_type = IEC958_MPEG2_EXT;
- ctx->pkt_offset = 4608;
- } else {
- ctx->data_type = mpeg_data_type [version & 1][layer];
- ctx->pkt_offset = mpeg_pkt_offset[version & 1][layer];
- }
- // TODO Data type dependant info (normal/karaoke, dynamic range control)
- return 0;
-}
-
-static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- AACADTSHeaderInfo hdr;
- GetBitContext gbc;
- int ret;
-
- init_get_bits(&gbc, pkt->data, AAC_ADTS_HEADER_SIZE * 8);
- ret = ff_aac_parse_header(&gbc, &hdr);
- if (ret < 0) {
- av_log(s, AV_LOG_ERROR, "Wrong AAC file format\n");
- return -1;
- }
-
- ctx->pkt_offset = hdr.samples << 2;
- switch (hdr.num_aac_frames) {
- case 1:
- ctx->data_type = IEC958_MPEG2_AAC;
- break;
- case 2:
- ctx->data_type = IEC958_MPEG2_AAC_LSF_2048;
- break;
- case 4:
- ctx->data_type = IEC958_MPEG2_AAC_LSF_4096;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "%i samples in AAC frame not supported\n",
- hdr.samples);
- return -1;
- }
- //TODO Data type dependent info (LC profile/SBR)
- return 0;
-}
-
-static int spdif_write_header(AVFormatContext *s)
-{
- IEC958Context *ctx = s->priv_data;
-
- switch (s->streams[0]->codec->codec_id) {
- case CODEC_ID_AC3:
- ctx->header_info = spdif_header_ac3;
- break;
- case CODEC_ID_MP1:
- case CODEC_ID_MP2:
- case CODEC_ID_MP3:
- ctx->header_info = spdif_header_mpeg;
- break;
- case CODEC_ID_DTS:
- ctx->header_info = spdif_header_dts;
- break;
- case CODEC_ID_AAC:
- ctx->header_info = spdif_header_aac;
- break;
- default:
- av_log(s, AV_LOG_ERROR, "codec not supported\n");
- return -1;
- }
- return 0;
-}
-
-static int spdif_write_trailer(AVFormatContext *s)
-{
- IEC958Context *ctx = s->priv_data;
- av_freep(&ctx->buffer);
- return 0;
-}
-
-static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
-{
- IEC958Context *ctx = s->priv_data;
- int ret, padding;
-
- ctx->pkt_size = FFALIGN(pkt->size, 2) << 3;
- ret = ctx->header_info(s, pkt);
- if (ret < 0)
- return -1;
-
- padding = (ctx->pkt_offset - BURST_HEADER_SIZE - pkt->size) >> 1;
- if (padding < 0) {
- av_log(s, AV_LOG_ERROR, "bitrate is too high\n");
- return -1;
- }
-
- put_le16(s->pb, SYNCWORD1); //Pa
- put_le16(s->pb, SYNCWORD2); //Pb
- put_le16(s->pb, ctx->data_type); //Pc
- put_le16(s->pb, ctx->pkt_size); //Pd
-
-#if HAVE_BIGENDIAN
- put_buffer(s->pb, pkt->data, pkt->size & ~1);
-#else
- av_fast_malloc(&ctx->buffer, &ctx->buffer_size, pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
- if (!ctx->buffer)
- return AVERROR(ENOMEM);
- bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)pkt->data, pkt->size >> 1);
- put_buffer(s->pb, ctx->buffer, pkt->size & ~1);
-#endif
-
- if (pkt->size & 1)
- put_be16(s->pb, pkt->data[pkt->size - 1]);
-
- for (; padding > 0; padding--)
- put_be16(s->pb, 0);
-
- av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
- ctx->data_type, pkt->size, ctx->pkt_offset);
-
- put_flush_packet(s->pb);
- return 0;
-}
-
-AVOutputFormat spdif_muxer = {
- "spdif",
- NULL_IF_CONFIG_SMALL("IEC958 - S/PDIF (IEC-61937)"),
- NULL,
- "spdif",
- sizeof(IEC958Context),
- CODEC_ID_AC3,
- CODEC_ID_NONE,
- spdif_write_header,
- spdif_write_packet,
- spdif_write_trailer,
-};
diff --git a/libavformat/spdifenc.c b/libavformat/spdifenc.c
new file mode 100644
index 0000000..ac84c50
--- /dev/null
+++ b/libavformat/spdifenc.c
@@ -0,0 +1,313 @@
+/*
+ * IEC958 muxer
+ * Copyright (c) 2009 Bartlomiej Wolowiec
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * IEC-61937 encapsulation of various formats, used by S/PDIF
+ * @author Bartlomiej Wolowiec
+ */
+
+/*
+ * Terminology used in specification:
+ * data-burst - IEC958 frame, contains header and encapsuled frame
+ * burst-preambule - IEC958 frame header, contains 16-bits words named Pa, Pb, Pc and Pd
+ * burst-payload - encapsuled frame
+ * Pa, Pb - syncword - 0xF872, 0x4E1F
+ * Pc - burst-info, contains data-type (bits 0-6), error flag (bit 7), data-type-dependent info (bits 8-12)
+ * and bitstream number (bits 13-15)
+ * data-type - determines type of encapsuled frames
+ * Pd - length code (number of bits or bytes of encapsuled frame - according to data_type)
+ *
+ * IEC958 frames at normal usage start every specific count of bytes,
+ * dependent from data-type (spaces between packets are filled by zeros)
+ */
+
+#include "avformat.h"
+#include "libavcodec/ac3.h"
+#include "libavcodec/dca.h"
+#include "libavcodec/aacadtsdec.h"
+
+#define SYNCWORD1 0xF872
+#define SYNCWORD2 0x4E1F
+#define BURST_HEADER_SIZE 0x8
+
+enum IEC958DataType {
+ IEC958_AC3 = 0x01, ///< AC-3 data
+ IEC958_MPEG1_LAYER1 = 0x04, ///< MPEG-1 layer 1
+ IEC958_MPEG1_LAYER23 = 0x05, ///< MPEG-1 layer 2 or 3 data or MPEG-2 without extension
+ IEC958_MPEG2_EXT = 0x06, ///< MPEG-2 data with extension
+ IEC958_MPEG2_AAC = 0x07, ///< MPEG-2 AAC ADTS
+ IEC958_MPEG2_LAYER1_LSF = 0x08, ///< MPEG-2, layer-1 low sampling frequency
+ IEC958_MPEG2_LAYER2_LSF = 0x09, ///< MPEG-2, layer-2 low sampling frequency
+ IEC958_MPEG2_LAYER3_LSF = 0x0A, ///< MPEG-2, layer-3 low sampling frequency
+ IEC958_DTS1 = 0x0B, ///< DTS type I (512 samples)
+ IEC958_DTS2 = 0x0C, ///< DTS type II (1024 samples)
+ IEC958_DTS3 = 0x0D, ///< DTS type III (2048 samples)
+ IEC958_ATRAC = 0x0E, ///< Atrac data
+ IEC958_ATRAC3 = 0x0F, ///< Atrac 3 data
+ IEC958_ATRACX = 0x10, ///< Atrac 3 plus data
+ IEC958_DTSHD = 0x11, ///< DTS HD data
+ IEC958_WMAPRO = 0x12, ///< WMA 9 Professional data
+ IEC958_MPEG2_AAC_LSF_2048 = 0x13, ///< MPEG-2 AAC ADTS half-rate low sampling frequency
+ IEC958_MPEG2_AAC_LSF_4096 = 0x13 | 0x20, ///< MPEG-2 AAC ADTS quarter-rate low sampling frequency
+ IEC958_EAC3 = 0x15, ///< E-AC-3 data
+ IEC958_TRUEHD = 0x16, ///< TrueHD data
+};
+
+typedef struct IEC958Context {
+ enum IEC958DataType data_type; ///< burst info - reference to type of payload of the data-burst
+ int pkt_size; ///< length code in bits
+ int pkt_offset; ///< data burst repetition period in bytes
+ uint8_t *buffer; ///< allocated buffer, used for swap bytes
+ int buffer_size; ///< size of allocated buffer
+
+ /// function, which generates codec dependent header information.
+ /// Sets data_type and data_offset
+ int (*header_info) (AVFormatContext *s, AVPacket *pkt);
+} IEC958Context;
+
+//TODO move to DSP
+static void bswap_buf16(uint16_t *dst, const uint16_t *src, int w)
+{
+ int i;
+
+ for (i = 0; i + 8 <= w; i += 8) {
+ dst[i + 0] = av_bswap16(src[i + 0]);
+ dst[i + 1] = av_bswap16(src[i + 1]);
+ dst[i + 2] = av_bswap16(src[i + 2]);
+ dst[i + 3] = av_bswap16(src[i + 3]);
+ dst[i + 4] = av_bswap16(src[i + 4]);
+ dst[i + 5] = av_bswap16(src[i + 5]);
+ dst[i + 6] = av_bswap16(src[i + 6]);
+ dst[i + 7] = av_bswap16(src[i + 7]);
+ }
+ for (; i < w; i++)
+ dst[i + 0] = av_bswap16(src[i + 0]);
+}
+
+static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
+{
+ IEC958Context *ctx = s->priv_data;
+ int bitstream_mode = pkt->data[6] & 0x7;
+
+ ctx->data_type = IEC958_AC3 | (bitstream_mode << 8);
+ ctx->pkt_offset = AC3_FRAME_SIZE << 2;
+ return 0;
+}
+
+static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
+{
+ IEC958Context *ctx = s->priv_data;
+ uint32_t syncword_dts = AV_RB32(pkt->data);
+ int blocks;
+
+ switch (syncword_dts) {
+ case DCA_MARKER_RAW_BE:
+ blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
+ break;
+ case DCA_MARKER_RAW_LE:
+ blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
+ break;
+ case DCA_MARKER_14B_BE:
+ blocks =
+ (((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
+ break;
+ case DCA_MARKER_14B_LE:
+ blocks =
+ (((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%x\n", syncword_dts);
+ return -1;
+ }
+ blocks++;
+ switch (blocks) {
+ case 512 >> 5: ctx->data_type = IEC958_DTS1; break;
+ case 1024 >> 5: ctx->data_type = IEC958_DTS2; break;
+ case 2048 >> 5: ctx->data_type = IEC958_DTS3; break;
+ default:
+ av_log(s, AV_LOG_ERROR, "%i samples in DTS frame not supported\n",
+ blocks << 5);
+ return -1;
+ }
+ ctx->pkt_offset = blocks << 7;
+
+ return 0;
+}
+
+static const enum IEC958DataType mpeg_data_type[2][3] = {
+ // LAYER1 LAYER2 LAYER3
+ { IEC958_MPEG2_LAYER1_LSF, IEC958_MPEG2_LAYER2_LSF, IEC958_MPEG2_LAYER3_LSF }, //MPEG2 LSF
+ { IEC958_MPEG1_LAYER1, IEC958_MPEG1_LAYER23, IEC958_MPEG1_LAYER23 }, //MPEG1
+};
+
+static const uint16_t mpeg_pkt_offset[2][3] = {
+ //LAYER1 LAYER2 LAYER3
+ { 3072, 9216, 4608 }, // MPEG2 LSF
+ { 1536, 4608, 4608 }, // MPEG1
+};
+
+static int spdif_header_mpeg(AVFormatContext *s, AVPacket *pkt)
+{
+ IEC958Context *ctx = s->priv_data;
+ int version = (pkt->data[1] >> 3) & 3;
+ int layer = 3 - ((pkt->data[1] >> 1) & 3);
+ int extension = pkt->data[2] & 1;
+
+ if (layer == 3 || version == 1) {
+ av_log(s, AV_LOG_ERROR, "Wrong MPEG file format\n");
+ return -1;
+ }
+ av_log(s, AV_LOG_DEBUG, "version: %i layer: %i extension: %i\n", version, layer, extension);
+ if (version == 2 && extension) {
+ ctx->data_type = IEC958_MPEG2_EXT;
+ ctx->pkt_offset = 4608;
+ } else {
+ ctx->data_type = mpeg_data_type [version & 1][layer];
+ ctx->pkt_offset = mpeg_pkt_offset[version & 1][layer];
+ }
+ // TODO Data type dependant info (normal/karaoke, dynamic range control)
+ return 0;
+}
+
+static int spdif_header_aac(AVFormatContext *s, AVPacket *pkt)
+{
+ IEC958Context *ctx = s->priv_data;
+ AACADTSHeaderInfo hdr;
+ GetBitContext gbc;
+ int ret;
+
+ init_get_bits(&gbc, pkt->data, AAC_ADTS_HEADER_SIZE * 8);
+ ret = ff_aac_parse_header(&gbc, &hdr);
+ if (ret < 0) {
+ av_log(s, AV_LOG_ERROR, "Wrong AAC file format\n");
+ return -1;
+ }
+
+ ctx->pkt_offset = hdr.samples << 2;
+ switch (hdr.num_aac_frames) {
+ case 1:
+ ctx->data_type = IEC958_MPEG2_AAC;
+ break;
+ case 2:
+ ctx->data_type = IEC958_MPEG2_AAC_LSF_2048;
+ break;
+ case 4:
+ ctx->data_type = IEC958_MPEG2_AAC_LSF_4096;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "%i samples in AAC frame not supported\n",
+ hdr.samples);
+ return -1;
+ }
+ //TODO Data type dependent info (LC profile/SBR)
+ return 0;
+}
+
+static int spdif_write_header(AVFormatContext *s)
+{
+ IEC958Context *ctx = s->priv_data;
+
+ switch (s->streams[0]->codec->codec_id) {
+ case CODEC_ID_AC3:
+ ctx->header_info = spdif_header_ac3;
+ break;
+ case CODEC_ID_MP1:
+ case CODEC_ID_MP2:
+ case CODEC_ID_MP3:
+ ctx->header_info = spdif_header_mpeg;
+ break;
+ case CODEC_ID_DTS:
+ ctx->header_info = spdif_header_dts;
+ break;
+ case CODEC_ID_AAC:
+ ctx->header_info = spdif_header_aac;
+ break;
+ default:
+ av_log(s, AV_LOG_ERROR, "codec not supported\n");
+ return -1;
+ }
+ return 0;
+}
+
+static int spdif_write_trailer(AVFormatContext *s)
+{
+ IEC958Context *ctx = s->priv_data;
+ av_freep(&ctx->buffer);
+ return 0;
+}
+
+static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
+{
+ IEC958Context *ctx = s->priv_data;
+ int ret, padding;
+
+ ctx->pkt_size = FFALIGN(pkt->size, 2) << 3;
+ ret = ctx->header_info(s, pkt);
+ if (ret < 0)
+ return -1;
+
+ padding = (ctx->pkt_offset - BURST_HEADER_SIZE - pkt->size) >> 1;
+ if (padding < 0) {
+ av_log(s, AV_LOG_ERROR, "bitrate is too high\n");
+ return -1;
+ }
+
+ put_le16(s->pb, SYNCWORD1); //Pa
+ put_le16(s->pb, SYNCWORD2); //Pb
+ put_le16(s->pb, ctx->data_type); //Pc
+ put_le16(s->pb, ctx->pkt_size); //Pd
+
+#if HAVE_BIGENDIAN
+ put_buffer(s->pb, pkt->data, pkt->size & ~1);
+#else
+ av_fast_malloc(&ctx->buffer, &ctx->buffer_size, pkt->size + FF_INPUT_BUFFER_PADDING_SIZE);
+ if (!ctx->buffer)
+ return AVERROR(ENOMEM);
+ bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)pkt->data, pkt->size >> 1);
+ put_buffer(s->pb, ctx->buffer, pkt->size & ~1);
+#endif
+
+ if (pkt->size & 1)
+ put_be16(s->pb, pkt->data[pkt->size - 1]);
+
+ for (; padding > 0; padding--)
+ put_be16(s->pb, 0);
+
+ av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
+ ctx->data_type, pkt->size, ctx->pkt_offset);
+
+ put_flush_packet(s->pb);
+ return 0;
+}
+
+AVOutputFormat spdif_muxer = {
+ "spdif",
+ NULL_IF_CONFIG_SMALL("IEC958 - S/PDIF (IEC-61937)"),
+ NULL,
+ "spdif",
+ sizeof(IEC958Context),
+ CODEC_ID_AC3,
+ CODEC_ID_NONE,
+ spdif_write_header,
+ spdif_write_packet,
+ spdif_write_trailer,
+};
--
1.7.3
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