[FFmpeg-cvslog] avconv: split configuring filter configuration to a separate file.
Anton Khirnov
git at videolan.org
Thu Aug 9 01:02:22 CEST 2012
ffmpeg | branch: master | Anton Khirnov <anton at khirnov.net> | Thu Aug 2 08:24:02 2012 +0200| [fe2147e93612cdcb4101b3b087f9a9f1835dba11] | committer: Anton Khirnov
avconv: split configuring filter configuration to a separate file.
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=fe2147e93612cdcb4101b3b087f9a9f1835dba11
---
Makefile | 2 +-
avconv.c | 529 ----------------------------------------------------
avconv.h | 2 +
avconv_filter.c | 560 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 563 insertions(+), 530 deletions(-)
diff --git a/Makefile b/Makefile
index 6477059..1a4858d 100644
--- a/Makefile
+++ b/Makefile
@@ -60,7 +60,7 @@ PROGS-$(CONFIG_AVSERVER) += avserver
PROGS := $(PROGS-yes:%=%$(EXESUF))
OBJS = cmdutils.o
-OBJS-avconv = avconv_opt.o
+OBJS-avconv = avconv_opt.o avconv_filter.o
TESTTOOLS = audiogen videogen rotozoom tiny_psnr base64
HOSTPROGS := $(TESTTOOLS:%=tests/%) doc/print_options
TOOLS = qt-faststart trasher
diff --git a/avconv.c b/avconv.c
index ad4a975..3b50dd4 100644
--- a/avconv.c
+++ b/avconv.c
@@ -111,535 +111,6 @@ int nb_output_files = 0;
FilterGraph **filtergraphs;
int nb_filtergraphs;
-/**
- * Define a function for building a string containing a list of
- * allowed formats,
- */
-#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator) \
-static char *choose_ ## var ## s(OutputStream *ost) \
-{ \
- if (ost->st->codec->var != none) { \
- get_name(ost->st->codec->var); \
- return av_strdup(name); \
- } else if (ost->enc->supported_list) { \
- const type *p; \
- AVIOContext *s = NULL; \
- uint8_t *ret; \
- int len; \
- \
- if (avio_open_dyn_buf(&s) < 0) \
- exit_program(1); \
- \
- for (p = ost->enc->supported_list; *p != none; p++) { \
- get_name(*p); \
- avio_printf(s, "%s" separator, name); \
- } \
- len = avio_close_dyn_buf(s, &ret); \
- ret[len - 1] = 0; \
- return ret; \
- } else \
- return NULL; \
-}
-
-#define GET_PIX_FMT_NAME(pix_fmt)\
- const char *name = av_get_pix_fmt_name(pix_fmt);
-
-DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
- GET_PIX_FMT_NAME, ":")
-
-#define GET_SAMPLE_FMT_NAME(sample_fmt)\
- const char *name = av_get_sample_fmt_name(sample_fmt)
-
-DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
- AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
-
-#define GET_SAMPLE_RATE_NAME(rate)\
- char name[16];\
- snprintf(name, sizeof(name), "%d", rate);
-
-DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
- GET_SAMPLE_RATE_NAME, ",")
-
-#define GET_CH_LAYOUT_NAME(ch_layout)\
- char name[16];\
- snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
-
-DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
- GET_CH_LAYOUT_NAME, ",")
-
-static FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
-{
- FilterGraph *fg = av_mallocz(sizeof(*fg));
-
- if (!fg)
- exit_program(1);
- fg->index = nb_filtergraphs;
-
- fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
- fg->nb_outputs + 1);
- if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
- exit_program(1);
- fg->outputs[0]->ost = ost;
- fg->outputs[0]->graph = fg;
-
- ost->filter = fg->outputs[0];
-
- fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
- fg->nb_inputs + 1);
- if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
- exit_program(1);
- fg->inputs[0]->ist = ist;
- fg->inputs[0]->graph = fg;
-
- ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
- &ist->nb_filters, ist->nb_filters + 1);
- ist->filters[ist->nb_filters - 1] = fg->inputs[0];
-
- filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
- &nb_filtergraphs, nb_filtergraphs + 1);
- filtergraphs[nb_filtergraphs - 1] = fg;
-
- return fg;
-}
-
-static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
-{
- InputStream *ist = NULL;
- enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
- int i;
-
- // TODO: support other filter types
- if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
- av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
- "currently.\n");
- exit_program(1);
- }
-
- if (in->name) {
- AVFormatContext *s;
- AVStream *st = NULL;
- char *p;
- int file_idx = strtol(in->name, &p, 0);
-
- if (file_idx < 0 || file_idx >= nb_input_files) {
- av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
- file_idx, fg->graph_desc);
- exit_program(1);
- }
- s = input_files[file_idx]->ctx;
-
- for (i = 0; i < s->nb_streams; i++) {
- if (s->streams[i]->codec->codec_type != type)
- continue;
- if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
- st = s->streams[i];
- break;
- }
- }
- if (!st) {
- av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
- "matches no streams.\n", p, fg->graph_desc);
- exit_program(1);
- }
- ist = input_streams[input_files[file_idx]->ist_index + st->index];
- } else {
- /* find the first unused stream of corresponding type */
- for (i = 0; i < nb_input_streams; i++) {
- ist = input_streams[i];
- if (ist->st->codec->codec_type == type && ist->discard)
- break;
- }
- if (i == nb_input_streams) {
- av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
- "unlabeled input pad %d on filter %s", in->pad_idx,
- in->filter_ctx->name);
- exit_program(1);
- }
- }
- av_assert0(ist);
-
- ist->discard = 0;
- ist->decoding_needed = 1;
- ist->st->discard = AVDISCARD_NONE;
-
- fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
- &fg->nb_inputs, fg->nb_inputs + 1);
- if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
- exit_program(1);
- fg->inputs[fg->nb_inputs - 1]->ist = ist;
- fg->inputs[fg->nb_inputs - 1]->graph = fg;
-
- ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
- &ist->nb_filters, ist->nb_filters + 1);
- ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
-}
-
-static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
-{
- char *pix_fmts;
- OutputStream *ost = ofilter->ost;
- AVCodecContext *codec = ost->st->codec;
- AVFilterContext *last_filter = out->filter_ctx;
- int pad_idx = out->pad_idx;
- int ret;
- char name[255];
-
- snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
- ret = avfilter_graph_create_filter(&ofilter->filter,
- avfilter_get_by_name("buffersink"),
- name, NULL, pix_fmts, fg->graph);
- if (ret < 0)
- return ret;
-
- if (codec->width || codec->height) {
- char args[255];
- AVFilterContext *filter;
-
- snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
- codec->width,
- codec->height,
- (unsigned)ost->sws_flags);
- snprintf(name, sizeof(name), "scaler for output stream %d:%d",
- ost->file_index, ost->index);
- if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
- name, args, NULL, fg->graph)) < 0)
- return ret;
- if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
- return ret;
-
- last_filter = filter;
- pad_idx = 0;
- }
-
- if ((pix_fmts = choose_pix_fmts(ost))) {
- AVFilterContext *filter;
- snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
- ost->file_index, ost->index);
- if ((ret = avfilter_graph_create_filter(&filter,
- avfilter_get_by_name("format"),
- "format", pix_fmts, NULL,
- fg->graph)) < 0)
- return ret;
- if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
- return ret;
-
- last_filter = filter;
- pad_idx = 0;
- av_freep(&pix_fmts);
- }
-
- if (ost->frame_rate.num) {
- AVFilterContext *fps;
- char args[255];
-
- snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
- ost->frame_rate.den);
- snprintf(name, sizeof(name), "fps for output stream %d:%d",
- ost->file_index, ost->index);
- ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
- name, args, NULL, fg->graph);
- if (ret < 0)
- return ret;
-
- ret = avfilter_link(last_filter, pad_idx, fps, 0);
- if (ret < 0)
- return ret;
- last_filter = fps;
- pad_idx = 0;
- }
-
- if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
- return ret;
-
- return 0;
-}
-
-static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
-{
- OutputStream *ost = ofilter->ost;
- AVCodecContext *codec = ost->st->codec;
- AVFilterContext *last_filter = out->filter_ctx;
- int pad_idx = out->pad_idx;
- char *sample_fmts, *sample_rates, *channel_layouts;
- char name[255];
- int ret;
-
-
- snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
- ret = avfilter_graph_create_filter(&ofilter->filter,
- avfilter_get_by_name("abuffersink"),
- name, NULL, NULL, fg->graph);
- if (ret < 0)
- return ret;
-
- if (codec->channels && !codec->channel_layout)
- codec->channel_layout = av_get_default_channel_layout(codec->channels);
-
- sample_fmts = choose_sample_fmts(ost);
- sample_rates = choose_sample_rates(ost);
- channel_layouts = choose_channel_layouts(ost);
- if (sample_fmts || sample_rates || channel_layouts) {
- AVFilterContext *format;
- char args[256];
- int len = 0;
-
- if (sample_fmts)
- len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
- sample_fmts);
- if (sample_rates)
- len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
- sample_rates);
- if (channel_layouts)
- len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
- channel_layouts);
- args[len - 1] = 0;
-
- av_freep(&sample_fmts);
- av_freep(&sample_rates);
- av_freep(&channel_layouts);
-
- snprintf(name, sizeof(name), "audio format for output stream %d:%d",
- ost->file_index, ost->index);
- ret = avfilter_graph_create_filter(&format,
- avfilter_get_by_name("aformat"),
- name, args, NULL, fg->graph);
- if (ret < 0)
- return ret;
-
- ret = avfilter_link(last_filter, pad_idx, format, 0);
- if (ret < 0)
- return ret;
-
- last_filter = format;
- pad_idx = 0;
- }
-
- if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
- return ret;
-
- return 0;
-}
-
-#define DESCRIBE_FILTER_LINK(f, inout, in) \
-{ \
- AVFilterContext *ctx = inout->filter_ctx; \
- AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
- int nb_pads = in ? ctx->input_count : ctx->output_count; \
- AVIOContext *pb; \
- \
- if (avio_open_dyn_buf(&pb) < 0) \
- exit_program(1); \
- \
- avio_printf(pb, "%s", ctx->filter->name); \
- if (nb_pads > 1) \
- avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
- avio_w8(pb, 0); \
- avio_close_dyn_buf(pb, &f->name); \
-}
-
-int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
-{
- av_freep(&ofilter->name);
- DESCRIBE_FILTER_LINK(ofilter, out, 0);
-
- switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
- case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
- case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
- default: av_assert0(0);
- }
-}
-
-static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
- AVFilterInOut *in)
-{
- AVFilterContext *first_filter = in->filter_ctx;
- AVFilter *filter = avfilter_get_by_name("buffer");
- InputStream *ist = ifilter->ist;
- AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
- ist->st->time_base;
- AVRational sar;
- char args[255], name[255];
- int pad_idx = in->pad_idx;
- int ret;
-
- sar = ist->st->sample_aspect_ratio.num ?
- ist->st->sample_aspect_ratio :
- ist->st->codec->sample_aspect_ratio;
- snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
- ist->st->codec->height, ist->st->codec->pix_fmt,
- tb.num, tb.den, sar.num, sar.den);
- snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
- ist->file_index, ist->st->index);
-
- if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
- args, NULL, fg->graph)) < 0)
- return ret;
-
- if (ist->framerate.num) {
- AVFilterContext *setpts;
-
- snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
- ist->file_index, ist->st->index);
- if ((ret = avfilter_graph_create_filter(&setpts,
- avfilter_get_by_name("setpts"),
- name, "N", NULL,
- fg->graph)) < 0)
- return ret;
-
- if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
- return ret;
-
- first_filter = setpts;
- pad_idx = 0;
- }
-
- if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
- return ret;
- return 0;
-}
-
-static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
- AVFilterInOut *in)
-{
- AVFilterContext *first_filter = in->filter_ctx;
- AVFilter *filter = avfilter_get_by_name("abuffer");
- InputStream *ist = ifilter->ist;
- int pad_idx = in->pad_idx;
- char args[255], name[255];
- int ret;
-
- snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
- ":channel_layout=0x%"PRIx64,
- 1, ist->st->codec->sample_rate,
- ist->st->codec->sample_rate,
- av_get_sample_fmt_name(ist->st->codec->sample_fmt),
- ist->st->codec->channel_layout);
- snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
- ist->file_index, ist->st->index);
-
- if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
- name, args, NULL,
- fg->graph)) < 0)
- return ret;
-
- if (audio_sync_method > 0) {
- AVFilterContext *async;
- char args[256];
- int len = 0;
-
- av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
- "asyncts audio filter instead.\n");
-
- if (audio_sync_method > 1)
- len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
- "max_comp=%d:", audio_sync_method);
- snprintf(args + len, sizeof(args) - len, "min_delta=%f",
- audio_drift_threshold);
-
- snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
- fg->index, ist->file_index, ist->st->index);
- ret = avfilter_graph_create_filter(&async,
- avfilter_get_by_name("asyncts"),
- name, args, NULL, fg->graph);
- if (ret < 0)
- return ret;
-
- ret = avfilter_link(async, 0, first_filter, pad_idx);
- if (ret < 0)
- return ret;
-
- first_filter = async;
- pad_idx = 0;
- }
- if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
- return ret;
-
- return 0;
-}
-
-static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
- AVFilterInOut *in)
-{
- av_freep(&ifilter->name);
- DESCRIBE_FILTER_LINK(ifilter, in, 1);
-
- switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
- case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
- case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
- default: av_assert0(0);
- }
-}
-
-int configure_filtergraph(FilterGraph *fg)
-{
- AVFilterInOut *inputs, *outputs, *cur;
- int ret, i, init = !fg->graph, simple = !fg->graph_desc;
- const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
- fg->graph_desc;
-
- avfilter_graph_free(&fg->graph);
- if (!(fg->graph = avfilter_graph_alloc()))
- return AVERROR(ENOMEM);
-
- if (simple) {
- OutputStream *ost = fg->outputs[0]->ost;
- char args[255];
- snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
- fg->graph->scale_sws_opts = av_strdup(args);
- }
-
- if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
- return ret;
-
- if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
- av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
- "exactly one input and output.\n", graph_desc);
- return AVERROR(EINVAL);
- }
-
- for (cur = inputs; !simple && init && cur; cur = cur->next)
- init_input_filter(fg, cur);
-
- for (cur = inputs, i = 0; cur; cur = cur->next, i++)
- if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
- return ret;
- avfilter_inout_free(&inputs);
-
- if (!init || simple) {
- /* we already know the mappings between lavfi outputs and output streams,
- * so we can finish the setup */
- for (cur = outputs, i = 0; cur; cur = cur->next, i++)
- configure_output_filter(fg, fg->outputs[i], cur);
- avfilter_inout_free(&outputs);
-
- if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
- return ret;
- } else {
- /* wait until output mappings are processed */
- for (cur = outputs; cur;) {
- fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
- &fg->nb_outputs, fg->nb_outputs + 1);
- if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
- exit_program(1);
- fg->outputs[fg->nb_outputs - 1]->graph = fg;
- fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
- cur = cur->next;
- fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
- }
- }
-
- return 0;
-}
-
-static int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
-{
- int i;
- for (i = 0; i < fg->nb_inputs; i++)
- if (fg->inputs[i]->ist == ist)
- return 1;
- return 0;
-}
-
static void term_exit(void)
{
av_log(NULL, AV_LOG_QUIET, "");
diff --git a/avconv.h b/avconv.h
index fb720d6..d8bf78b 100644
--- a/avconv.h
+++ b/avconv.h
@@ -356,5 +356,7 @@ int guess_input_channel_layout(InputStream *ist);
int configure_filtergraph(FilterGraph *fg);
int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out);
+int ist_in_filtergraph(FilterGraph *fg, InputStream *ist);
+FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost);
#endif /* AVCONV_H */
diff --git a/avconv_filter.c b/avconv_filter.c
new file mode 100644
index 0000000..d0ab4dc
--- /dev/null
+++ b/avconv_filter.c
@@ -0,0 +1,560 @@
+/*
+ * avconv filter configuration
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "avconv.h"
+
+#include "libavfilter/avfilter.h"
+#include "libavfilter/avfiltergraph.h"
+
+#include "libavutil/audioconvert.h"
+#include "libavutil/avassert.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/pixfmt.h"
+#include "libavutil/samplefmt.h"
+
+/**
+ * Define a function for building a string containing a list of
+ * allowed formats,
+ */
+#define DEF_CHOOSE_FORMAT(type, var, supported_list, none, get_name, separator)\
+static char *choose_ ## var ## s(OutputStream *ost) \
+{ \
+ if (ost->st->codec->var != none) { \
+ get_name(ost->st->codec->var); \
+ return av_strdup(name); \
+ } else if (ost->enc->supported_list) { \
+ const type *p; \
+ AVIOContext *s = NULL; \
+ uint8_t *ret; \
+ int len; \
+ \
+ if (avio_open_dyn_buf(&s) < 0) \
+ exit_program(1); \
+ \
+ for (p = ost->enc->supported_list; *p != none; p++) { \
+ get_name(*p); \
+ avio_printf(s, "%s" separator, name); \
+ } \
+ len = avio_close_dyn_buf(s, &ret); \
+ ret[len - 1] = 0; \
+ return ret; \
+ } else \
+ return NULL; \
+}
+
+#define GET_PIX_FMT_NAME(pix_fmt)\
+ const char *name = av_get_pix_fmt_name(pix_fmt);
+
+DEF_CHOOSE_FORMAT(enum PixelFormat, pix_fmt, pix_fmts, PIX_FMT_NONE,
+ GET_PIX_FMT_NAME, ":")
+
+#define GET_SAMPLE_FMT_NAME(sample_fmt)\
+ const char *name = av_get_sample_fmt_name(sample_fmt)
+
+DEF_CHOOSE_FORMAT(enum AVSampleFormat, sample_fmt, sample_fmts,
+ AV_SAMPLE_FMT_NONE, GET_SAMPLE_FMT_NAME, ",")
+
+#define GET_SAMPLE_RATE_NAME(rate)\
+ char name[16];\
+ snprintf(name, sizeof(name), "%d", rate);
+
+DEF_CHOOSE_FORMAT(int, sample_rate, supported_samplerates, 0,
+ GET_SAMPLE_RATE_NAME, ",")
+
+#define GET_CH_LAYOUT_NAME(ch_layout)\
+ char name[16];\
+ snprintf(name, sizeof(name), "0x%"PRIx64, ch_layout);
+
+DEF_CHOOSE_FORMAT(uint64_t, channel_layout, channel_layouts, 0,
+ GET_CH_LAYOUT_NAME, ",")
+
+FilterGraph *init_simple_filtergraph(InputStream *ist, OutputStream *ost)
+{
+ FilterGraph *fg = av_mallocz(sizeof(*fg));
+
+ if (!fg)
+ exit_program(1);
+ fg->index = nb_filtergraphs;
+
+ fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs), &fg->nb_outputs,
+ fg->nb_outputs + 1);
+ if (!(fg->outputs[0] = av_mallocz(sizeof(*fg->outputs[0]))))
+ exit_program(1);
+ fg->outputs[0]->ost = ost;
+ fg->outputs[0]->graph = fg;
+
+ ost->filter = fg->outputs[0];
+
+ fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs), &fg->nb_inputs,
+ fg->nb_inputs + 1);
+ if (!(fg->inputs[0] = av_mallocz(sizeof(*fg->inputs[0]))))
+ exit_program(1);
+ fg->inputs[0]->ist = ist;
+ fg->inputs[0]->graph = fg;
+
+ ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
+ &ist->nb_filters, ist->nb_filters + 1);
+ ist->filters[ist->nb_filters - 1] = fg->inputs[0];
+
+ filtergraphs = grow_array(filtergraphs, sizeof(*filtergraphs),
+ &nb_filtergraphs, nb_filtergraphs + 1);
+ filtergraphs[nb_filtergraphs - 1] = fg;
+
+ return fg;
+}
+
+static void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
+{
+ InputStream *ist = NULL;
+ enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
+ int i;
+
+ // TODO: support other filter types
+ if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
+ av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
+ "currently.\n");
+ exit_program(1);
+ }
+
+ if (in->name) {
+ AVFormatContext *s;
+ AVStream *st = NULL;
+ char *p;
+ int file_idx = strtol(in->name, &p, 0);
+
+ if (file_idx < 0 || file_idx >= nb_input_files) {
+ av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtegraph description %s.\n",
+ file_idx, fg->graph_desc);
+ exit_program(1);
+ }
+ s = input_files[file_idx]->ctx;
+
+ for (i = 0; i < s->nb_streams; i++) {
+ if (s->streams[i]->codec->codec_type != type)
+ continue;
+ if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
+ st = s->streams[i];
+ break;
+ }
+ }
+ if (!st) {
+ av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
+ "matches no streams.\n", p, fg->graph_desc);
+ exit_program(1);
+ }
+ ist = input_streams[input_files[file_idx]->ist_index + st->index];
+ } else {
+ /* find the first unused stream of corresponding type */
+ for (i = 0; i < nb_input_streams; i++) {
+ ist = input_streams[i];
+ if (ist->st->codec->codec_type == type && ist->discard)
+ break;
+ }
+ if (i == nb_input_streams) {
+ av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
+ "unlabeled input pad %d on filter %s", in->pad_idx,
+ in->filter_ctx->name);
+ exit_program(1);
+ }
+ }
+ av_assert0(ist);
+
+ ist->discard = 0;
+ ist->decoding_needed = 1;
+ ist->st->discard = AVDISCARD_NONE;
+
+ fg->inputs = grow_array(fg->inputs, sizeof(*fg->inputs),
+ &fg->nb_inputs, fg->nb_inputs + 1);
+ if (!(fg->inputs[fg->nb_inputs - 1] = av_mallocz(sizeof(*fg->inputs[0]))))
+ exit_program(1);
+ fg->inputs[fg->nb_inputs - 1]->ist = ist;
+ fg->inputs[fg->nb_inputs - 1]->graph = fg;
+
+ ist->filters = grow_array(ist->filters, sizeof(*ist->filters),
+ &ist->nb_filters, ist->nb_filters + 1);
+ ist->filters[ist->nb_filters - 1] = fg->inputs[fg->nb_inputs - 1];
+}
+
+static int configure_output_video_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+ char *pix_fmts;
+ OutputStream *ost = ofilter->ost;
+ AVCodecContext *codec = ost->st->codec;
+ AVFilterContext *last_filter = out->filter_ctx;
+ int pad_idx = out->pad_idx;
+ int ret;
+ char name[255];
+
+ snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
+ ret = avfilter_graph_create_filter(&ofilter->filter,
+ avfilter_get_by_name("buffersink"),
+ name, NULL, pix_fmts, fg->graph);
+ if (ret < 0)
+ return ret;
+
+ if (codec->width || codec->height) {
+ char args[255];
+ AVFilterContext *filter;
+
+ snprintf(args, sizeof(args), "%d:%d:flags=0x%X",
+ codec->width,
+ codec->height,
+ (unsigned)ost->sws_flags);
+ snprintf(name, sizeof(name), "scaler for output stream %d:%d",
+ ost->file_index, ost->index);
+ if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
+ name, args, NULL, fg->graph)) < 0)
+ return ret;
+ if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
+ return ret;
+
+ last_filter = filter;
+ pad_idx = 0;
+ }
+
+ if ((pix_fmts = choose_pix_fmts(ost))) {
+ AVFilterContext *filter;
+ snprintf(name, sizeof(name), "pixel format for output stream %d:%d",
+ ost->file_index, ost->index);
+ if ((ret = avfilter_graph_create_filter(&filter,
+ avfilter_get_by_name("format"),
+ "format", pix_fmts, NULL,
+ fg->graph)) < 0)
+ return ret;
+ if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
+ return ret;
+
+ last_filter = filter;
+ pad_idx = 0;
+ av_freep(&pix_fmts);
+ }
+
+ if (ost->frame_rate.num) {
+ AVFilterContext *fps;
+ char args[255];
+
+ snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
+ ost->frame_rate.den);
+ snprintf(name, sizeof(name), "fps for output stream %d:%d",
+ ost->file_index, ost->index);
+ ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
+ name, args, NULL, fg->graph);
+ if (ret < 0)
+ return ret;
+
+ ret = avfilter_link(last_filter, pad_idx, fps, 0);
+ if (ret < 0)
+ return ret;
+ last_filter = fps;
+ pad_idx = 0;
+ }
+
+ if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
+ return ret;
+
+ return 0;
+}
+
+static int configure_output_audio_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+ OutputStream *ost = ofilter->ost;
+ AVCodecContext *codec = ost->st->codec;
+ AVFilterContext *last_filter = out->filter_ctx;
+ int pad_idx = out->pad_idx;
+ char *sample_fmts, *sample_rates, *channel_layouts;
+ char name[255];
+ int ret;
+
+
+ snprintf(name, sizeof(name), "output stream %d:%d", ost->file_index, ost->index);
+ ret = avfilter_graph_create_filter(&ofilter->filter,
+ avfilter_get_by_name("abuffersink"),
+ name, NULL, NULL, fg->graph);
+ if (ret < 0)
+ return ret;
+
+ if (codec->channels && !codec->channel_layout)
+ codec->channel_layout = av_get_default_channel_layout(codec->channels);
+
+ sample_fmts = choose_sample_fmts(ost);
+ sample_rates = choose_sample_rates(ost);
+ channel_layouts = choose_channel_layouts(ost);
+ if (sample_fmts || sample_rates || channel_layouts) {
+ AVFilterContext *format;
+ char args[256];
+ int len = 0;
+
+ if (sample_fmts)
+ len += snprintf(args + len, sizeof(args) - len, "sample_fmts=%s:",
+ sample_fmts);
+ if (sample_rates)
+ len += snprintf(args + len, sizeof(args) - len, "sample_rates=%s:",
+ sample_rates);
+ if (channel_layouts)
+ len += snprintf(args + len, sizeof(args) - len, "channel_layouts=%s:",
+ channel_layouts);
+ args[len - 1] = 0;
+
+ av_freep(&sample_fmts);
+ av_freep(&sample_rates);
+ av_freep(&channel_layouts);
+
+ snprintf(name, sizeof(name), "audio format for output stream %d:%d",
+ ost->file_index, ost->index);
+ ret = avfilter_graph_create_filter(&format,
+ avfilter_get_by_name("aformat"),
+ name, args, NULL, fg->graph);
+ if (ret < 0)
+ return ret;
+
+ ret = avfilter_link(last_filter, pad_idx, format, 0);
+ if (ret < 0)
+ return ret;
+
+ last_filter = format;
+ pad_idx = 0;
+ }
+
+ if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
+ return ret;
+
+ return 0;
+}
+
+#define DESCRIBE_FILTER_LINK(f, inout, in) \
+{ \
+ AVFilterContext *ctx = inout->filter_ctx; \
+ AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads; \
+ int nb_pads = in ? ctx->input_count : ctx->output_count; \
+ AVIOContext *pb; \
+ \
+ if (avio_open_dyn_buf(&pb) < 0) \
+ exit_program(1); \
+ \
+ avio_printf(pb, "%s", ctx->filter->name); \
+ if (nb_pads > 1) \
+ avio_printf(pb, ":%s", avfilter_pad_get_name(pads, inout->pad_idx));\
+ avio_w8(pb, 0); \
+ avio_close_dyn_buf(pb, &f->name); \
+}
+
+int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter, AVFilterInOut *out)
+{
+ av_freep(&ofilter->name);
+ DESCRIBE_FILTER_LINK(ofilter, out, 0);
+
+ switch (avfilter_pad_get_type(out->filter_ctx->output_pads, out->pad_idx)) {
+ case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, ofilter, out);
+ case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, ofilter, out);
+ default: av_assert0(0);
+ }
+}
+
+static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
+ AVFilterInOut *in)
+{
+ AVFilterContext *first_filter = in->filter_ctx;
+ AVFilter *filter = avfilter_get_by_name("buffer");
+ InputStream *ist = ifilter->ist;
+ AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
+ ist->st->time_base;
+ AVRational sar;
+ char args[255], name[255];
+ int pad_idx = in->pad_idx;
+ int ret;
+
+ sar = ist->st->sample_aspect_ratio.num ?
+ ist->st->sample_aspect_ratio :
+ ist->st->codec->sample_aspect_ratio;
+ snprintf(args, sizeof(args), "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
+ ist->st->codec->height, ist->st->codec->pix_fmt,
+ tb.num, tb.den, sar.num, sar.den);
+ snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
+ ist->file_index, ist->st->index);
+
+ if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter, name,
+ args, NULL, fg->graph)) < 0)
+ return ret;
+
+ if (ist->framerate.num) {
+ AVFilterContext *setpts;
+
+ snprintf(name, sizeof(name), "force CFR for input from stream %d:%d",
+ ist->file_index, ist->st->index);
+ if ((ret = avfilter_graph_create_filter(&setpts,
+ avfilter_get_by_name("setpts"),
+ name, "N", NULL,
+ fg->graph)) < 0)
+ return ret;
+
+ if ((ret = avfilter_link(setpts, 0, first_filter, pad_idx)) < 0)
+ return ret;
+
+ first_filter = setpts;
+ pad_idx = 0;
+ }
+
+ if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
+ return ret;
+ return 0;
+}
+
+static int configure_input_audio_filter(FilterGraph *fg, InputFilter *ifilter,
+ AVFilterInOut *in)
+{
+ AVFilterContext *first_filter = in->filter_ctx;
+ AVFilter *filter = avfilter_get_by_name("abuffer");
+ InputStream *ist = ifilter->ist;
+ int pad_idx = in->pad_idx;
+ char args[255], name[255];
+ int ret;
+
+ snprintf(args, sizeof(args), "time_base=%d/%d:sample_rate=%d:sample_fmt=%s"
+ ":channel_layout=0x%"PRIx64,
+ 1, ist->st->codec->sample_rate,
+ ist->st->codec->sample_rate,
+ av_get_sample_fmt_name(ist->st->codec->sample_fmt),
+ ist->st->codec->channel_layout);
+ snprintf(name, sizeof(name), "graph %d input from stream %d:%d", fg->index,
+ ist->file_index, ist->st->index);
+
+ if ((ret = avfilter_graph_create_filter(&ifilter->filter, filter,
+ name, args, NULL,
+ fg->graph)) < 0)
+ return ret;
+
+ if (audio_sync_method > 0) {
+ AVFilterContext *async;
+ char args[256];
+ int len = 0;
+
+ av_log(NULL, AV_LOG_WARNING, "-async has been deprecated. Used the "
+ "asyncts audio filter instead.\n");
+
+ if (audio_sync_method > 1)
+ len += snprintf(args + len, sizeof(args) - len, "compensate=1:"
+ "max_comp=%d:", audio_sync_method);
+ snprintf(args + len, sizeof(args) - len, "min_delta=%f",
+ audio_drift_threshold);
+
+ snprintf(name, sizeof(name), "graph %d audio sync for input stream %d:%d",
+ fg->index, ist->file_index, ist->st->index);
+ ret = avfilter_graph_create_filter(&async,
+ avfilter_get_by_name("asyncts"),
+ name, args, NULL, fg->graph);
+ if (ret < 0)
+ return ret;
+
+ ret = avfilter_link(async, 0, first_filter, pad_idx);
+ if (ret < 0)
+ return ret;
+
+ first_filter = async;
+ pad_idx = 0;
+ }
+ if ((ret = avfilter_link(ifilter->filter, 0, first_filter, pad_idx)) < 0)
+ return ret;
+
+ return 0;
+}
+
+static int configure_input_filter(FilterGraph *fg, InputFilter *ifilter,
+ AVFilterInOut *in)
+{
+ av_freep(&ifilter->name);
+ DESCRIBE_FILTER_LINK(ifilter, in, 1);
+
+ switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
+ case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
+ case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
+ default: av_assert0(0);
+ }
+}
+
+int configure_filtergraph(FilterGraph *fg)
+{
+ AVFilterInOut *inputs, *outputs, *cur;
+ int ret, i, init = !fg->graph, simple = !fg->graph_desc;
+ const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
+ fg->graph_desc;
+
+ avfilter_graph_free(&fg->graph);
+ if (!(fg->graph = avfilter_graph_alloc()))
+ return AVERROR(ENOMEM);
+
+ if (simple) {
+ OutputStream *ost = fg->outputs[0]->ost;
+ char args[255];
+ snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
+ fg->graph->scale_sws_opts = av_strdup(args);
+ }
+
+ if ((ret = avfilter_graph_parse2(fg->graph, graph_desc, &inputs, &outputs)) < 0)
+ return ret;
+
+ if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
+ av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' does not have "
+ "exactly one input and output.\n", graph_desc);
+ return AVERROR(EINVAL);
+ }
+
+ for (cur = inputs; !simple && init && cur; cur = cur->next)
+ init_input_filter(fg, cur);
+
+ for (cur = inputs, i = 0; cur; cur = cur->next, i++)
+ if ((ret = configure_input_filter(fg, fg->inputs[i], cur)) < 0)
+ return ret;
+ avfilter_inout_free(&inputs);
+
+ if (!init || simple) {
+ /* we already know the mappings between lavfi outputs and output streams,
+ * so we can finish the setup */
+ for (cur = outputs, i = 0; cur; cur = cur->next, i++)
+ configure_output_filter(fg, fg->outputs[i], cur);
+ avfilter_inout_free(&outputs);
+
+ if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
+ return ret;
+ } else {
+ /* wait until output mappings are processed */
+ for (cur = outputs; cur;) {
+ fg->outputs = grow_array(fg->outputs, sizeof(*fg->outputs),
+ &fg->nb_outputs, fg->nb_outputs + 1);
+ if (!(fg->outputs[fg->nb_outputs - 1] = av_mallocz(sizeof(*fg->outputs[0]))))
+ exit_program(1);
+ fg->outputs[fg->nb_outputs - 1]->graph = fg;
+ fg->outputs[fg->nb_outputs - 1]->out_tmp = cur;
+ cur = cur->next;
+ fg->outputs[fg->nb_outputs - 1]->out_tmp->next = NULL;
+ }
+ }
+
+ return 0;
+}
+
+int ist_in_filtergraph(FilterGraph *fg, InputStream *ist)
+{
+ int i;
+ for (i = 0; i < fg->nb_inputs; i++)
+ if (fg->inputs[i]->ist == ist)
+ return 1;
+ return 0;
+}
+
More information about the ffmpeg-cvslog
mailing list