virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2024-12-12 19:18:44 +02:00
Code Issues Releases Activity
3bd7c57125
FFmpeg/fftools/ffmpeg_filter.c
Anton Khirnov 3bd7c57125 fftools/ffmpeg_filter: implement filtergraph chaining 
This allows one complex filtergraph's output to be sent as input to
another one, which is useful in certain situations (one is described in
the docs).

Chaining filtergraphs was already effectively possible by using a
wrapped_avframe encoder connected to a loopback decoder, but it is ugly,
non-obvious and inefficient.
2024-04-09 10:34:18 +02:00

3064 lines
96 KiB
C
Raw Blame History

/*
* ffmpeg filter configuration
*
* 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
*/
#include <stdint.h>
#include "ffmpeg.h"
#include "libavfilter/avfilter.h"
#include "libavfilter/buffersink.h"
#include "libavfilter/buffersrc.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "libavutil/samplefmt.h"
#include "libavutil/time.h"
#include "libavutil/timestamp.h"
// FIXME private header, used for mid_pred()
#include "libavcodec/mathops.h"
typedef struct FilterGraphPriv {
FilterGraph fg;
// name used for logging
char log_name[32];
int is_simple;
// true when the filtergraph contains only meta filters
// that do not modify the frame data
int is_meta;
// source filters are present in the graph
int have_sources;
int disable_conversions;
unsigned nb_outputs_done;
const char *graph_desc;
char *nb_threads;
// frame for temporarily holding output from the filtergraph
AVFrame *frame;
// frame for sending output to the encoder
AVFrame *frame_enc;
Scheduler *sch;
unsigned sch_idx;
} FilterGraphPriv;
static FilterGraphPriv *fgp_from_fg(FilterGraph *fg)
{
return (FilterGraphPriv*)fg;
}
static const FilterGraphPriv *cfgp_from_cfg(const FilterGraph *fg)
{
return (const FilterGraphPriv*)fg;
}
// data that is local to the filter thread and not visible outside of it
typedef struct FilterGraphThread {
AVFilterGraph *graph;
AVFrame *frame;
// Temporary buffer for output frames, since on filtergraph reset
// we cannot send them to encoders immediately.
// The output index is stored in frame opaque.
AVFifo *frame_queue_out;
// index of the next input to request from the scheduler
unsigned next_in;
// set to 1 after at least one frame passed through this output
int got_frame;
// EOF status of each input/output, as received by the thread
uint8_t *eof_in;
uint8_t *eof_out;
} FilterGraphThread;
typedef struct InputFilterPriv {
InputFilter ifilter;
InputFilterOptions opts;
int index;
AVFilterContext *filter;
// used to hold submitted input
AVFrame *frame;
/* for filters that are not yet bound to an input stream,
* this stores the input linklabel, if any */
uint8_t *linklabel;
// filter data type
enum AVMediaType type;
// source data type: AVMEDIA_TYPE_SUBTITLE for sub2video,
// same as type otherwise
enum AVMediaType type_src;
int eof;
int bound;
// parameters configured for this input
int format;
int width, height;
AVRational sample_aspect_ratio;
enum AVColorSpace color_space;
enum AVColorRange color_range;
int sample_rate;
AVChannelLayout ch_layout;
AVRational time_base;
AVFifo *frame_queue;
AVBufferRef *hw_frames_ctx;
int displaymatrix_present;
int displaymatrix_applied;
int32_t displaymatrix[9];
struct {
AVFrame *frame;
int64_t last_pts;
int64_t end_pts;
///< marks if sub2video_update should force an initialization
unsigned int initialize;
} sub2video;
} InputFilterPriv;
static InputFilterPriv *ifp_from_ifilter(InputFilter *ifilter)
{
return (InputFilterPriv*)ifilter;
}
typedef struct FPSConvContext {
AVFrame *last_frame;
/* number of frames emitted by the video-encoding sync code */
int64_t frame_number;
/* history of nb_frames_prev, i.e. the number of times the
* previous frame was duplicated by vsync code in recent
* do_video_out() calls */
int64_t frames_prev_hist[3];
uint64_t dup_warning;
int last_dropped;
int dropped_keyframe;
enum VideoSyncMethod vsync_method;
AVRational framerate;
AVRational framerate_max;
const AVRational *framerate_supported;
int framerate_clip;
} FPSConvContext;
typedef struct OutputFilterPriv {
OutputFilter ofilter;
int index;
void *log_parent;
char log_name[32];
char *name;
AVFilterContext *filter;
/* desired output stream properties */
int format;
int width, height;
int sample_rate;
AVChannelLayout ch_layout;
// time base in which the output is sent to our downstream
// does not need to match the filtersink's timebase
AVRational tb_out;
// at least one frame with the above timebase was sent
// to our downstream, so it cannot change anymore
int tb_out_locked;
AVRational sample_aspect_ratio;
AVDictionary *sws_opts;
AVDictionary *swr_opts;
// those are only set if no format is specified and the encoder gives us multiple options
// They point directly to the relevant lists of the encoder.
const int *formats;
const AVChannelLayout *ch_layouts;
const int *sample_rates;
AVRational enc_timebase;
int64_t trim_start_us;
int64_t trim_duration_us;
// offset for output timestamps, in AV_TIME_BASE_Q
int64_t ts_offset;
int64_t next_pts;
FPSConvContext fps;
unsigned flags;
} OutputFilterPriv;
static OutputFilterPriv *ofp_from_ofilter(OutputFilter *ofilter)
{
return (OutputFilterPriv*)ofilter;
}
typedef struct FilterCommand {
char *target;
char *command;
char *arg;
double time;
int all_filters;
} FilterCommand;
static void filter_command_free(void *opaque, uint8_t *data)
{
FilterCommand *fc = (FilterCommand*)data;
av_freep(&fc->target);
av_freep(&fc->command);
av_freep(&fc->arg);
av_free(data);
}
static int sub2video_get_blank_frame(InputFilterPriv *ifp)
{
AVFrame *frame = ifp->sub2video.frame;
int ret;
av_frame_unref(frame);
frame->width = ifp->width;
frame->height = ifp->height;
frame->format = ifp->format;
frame->colorspace = ifp->color_space;
frame->color_range = ifp->color_range;
ret = av_frame_get_buffer(frame, 0);
if (ret < 0)
return ret;
memset(frame->data[0], 0, frame->height * frame->linesize[0]);
return 0;
}
static void sub2video_copy_rect(uint8_t *dst, int dst_linesize, int w, int h,
AVSubtitleRect *r)
{
uint32_t *pal, *dst2;
uint8_t *src, *src2;
int x, y;
if (r->type != SUBTITLE_BITMAP) {
av_log(NULL, AV_LOG_WARNING, "sub2video: non-bitmap subtitle\n");
return;
}
if (r->x < 0 || r->x + r->w > w || r->y < 0 || r->y + r->h > h) {
av_log(NULL, AV_LOG_WARNING, "sub2video: rectangle (%d %d %d %d) overflowing %d %d\n",
r->x, r->y, r->w, r->h, w, h
);
return;
}
dst += r->y * dst_linesize + r->x * 4;
src = r->data[0];
pal = (uint32_t *)r->data[1];
for (y = 0; y < r->h; y++) {
dst2 = (uint32_t *)dst;
src2 = src;
for (x = 0; x < r->w; x++)
*(dst2++) = pal[*(src2++)];
dst += dst_linesize;
src += r->linesize[0];
}
}
static void sub2video_push_ref(InputFilterPriv *ifp, int64_t pts)
{
AVFrame *frame = ifp->sub2video.frame;
int ret;
av_assert1(frame->data[0]);
ifp->sub2video.last_pts = frame->pts = pts;
ret = av_buffersrc_add_frame_flags(ifp->filter, frame,
AV_BUFFERSRC_FLAG_KEEP_REF |
AV_BUFFERSRC_FLAG_PUSH);
if (ret != AVERROR_EOF && ret < 0)
av_log(NULL, AV_LOG_WARNING, "Error while add the frame to buffer source(%s).\n",
av_err2str(ret));
}
static void sub2video_update(InputFilterPriv *ifp, int64_t heartbeat_pts,
const AVSubtitle *sub)
{
AVFrame *frame = ifp->sub2video.frame;
int8_t *dst;
int dst_linesize;
int num_rects;
int64_t pts, end_pts;
if (sub) {
pts = av_rescale_q(sub->pts + sub->start_display_time * 1000LL,
AV_TIME_BASE_Q, ifp->time_base);
end_pts = av_rescale_q(sub->pts + sub->end_display_time * 1000LL,
AV_TIME_BASE_Q, ifp->time_base);
num_rects = sub->num_rects;
} else {
/* If we are initializing the system, utilize current heartbeat
PTS as the start time, and show until the following subpicture
is received. Otherwise, utilize the previous subpicture's end time
as the fall-back value. */
pts = ifp->sub2video.initialize ?
heartbeat_pts : ifp->sub2video.end_pts;
end_pts = INT64_MAX;
num_rects = 0;
}
if (sub2video_get_blank_frame(ifp) < 0) {
av_log(NULL, AV_LOG_ERROR,
"Impossible to get a blank canvas.\n");
return;
}
dst = frame->data [0];
dst_linesize = frame->linesize[0];
for (int i = 0; i < num_rects; i++)
sub2video_copy_rect(dst, dst_linesize, frame->width, frame->height, sub->rects[i]);
sub2video_push_ref(ifp, pts);
ifp->sub2video.end_pts = end_pts;
ifp->sub2video.initialize = 0;
}
/* *dst may return be set to NULL (no pixel format found), a static string or a
* string backed by the bprint. Nothing has been written to the AVBPrint in case
* NULL is returned. The AVBPrint provided should be clean. */
static int choose_pix_fmts(OutputFilter *ofilter, AVBPrint *bprint,
const char **dst)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
*dst = NULL;
if (ofp->flags & OFILTER_FLAG_DISABLE_CONVERT || ofp->format != AV_PIX_FMT_NONE) {
*dst = ofp->format == AV_PIX_FMT_NONE ? NULL :
av_get_pix_fmt_name(ofp->format);
} else if (ofp->formats) {
const enum AVPixelFormat *p = ofp->formats;
for (; *p != AV_PIX_FMT_NONE; p++) {
const char *name = av_get_pix_fmt_name(*p);
av_bprintf(bprint, "%s%c", name, p[1] == AV_PIX_FMT_NONE ? '\0' : '|');
}
if (!av_bprint_is_complete(bprint))
return AVERROR(ENOMEM);
*dst = bprint->str;
}
return 0;
}
/* Define a function for appending a list of allowed formats
* to an AVBPrint. If nonempty, the list will have a header. */
#define DEF_CHOOSE_FORMAT(name, type, var, supported_list, none, printf_format, get_name) \
static void choose_ ## name (OutputFilterPriv *ofp, AVBPrint *bprint) \
{ \
if (ofp->var == none && !ofp->supported_list) \
return; \
av_bprintf(bprint, #name "="); \
if (ofp->var != none) { \
av_bprintf(bprint, printf_format, get_name(ofp->var)); \
} else { \
const type *p; \
\
for (p = ofp->supported_list; *p != none; p++) { \
av_bprintf(bprint, printf_format "|", get_name(*p)); \
} \
if (bprint->len > 0) \
bprint->str[--bprint->len] = '\0'; \
} \
av_bprint_chars(bprint, ':', 1); \
}
//DEF_CHOOSE_FORMAT(pix_fmts, enum AVPixelFormat, format, formats, AV_PIX_FMT_NONE,
// GET_PIX_FMT_NAME)
DEF_CHOOSE_FORMAT(sample_fmts, enum AVSampleFormat, format, formats,
AV_SAMPLE_FMT_NONE, "%s", av_get_sample_fmt_name)
DEF_CHOOSE_FORMAT(sample_rates, int, sample_rate, sample_rates, 0,
"%d", )
static void choose_channel_layouts(OutputFilterPriv *ofp, AVBPrint *bprint)
{
if (av_channel_layout_check(&ofp->ch_layout)) {
av_bprintf(bprint, "channel_layouts=");
av_channel_layout_describe_bprint(&ofp->ch_layout, bprint);
} else if (ofp->ch_layouts) {
const AVChannelLayout *p;
av_bprintf(bprint, "channel_layouts=");
for (p = ofp->ch_layouts; p->nb_channels; p++) {
av_channel_layout_describe_bprint(p, bprint);
av_bprintf(bprint, "|");
}
if (bprint->len > 0)
bprint->str[--bprint->len] = '\0';
} else
return;
av_bprint_chars(bprint, ':', 1);
}
static int read_binary(const char *path, uint8_t **data, int *len)
{
AVIOContext *io = NULL;
int64_t fsize;
int ret;
*data = NULL;
*len = 0;
ret = avio_open2(&io, path, AVIO_FLAG_READ, &int_cb, NULL);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Cannot open file '%s': %s\n",
path, av_err2str(ret));
return ret;
}
fsize = avio_size(io);
if (fsize < 0 || fsize > INT_MAX) {
av_log(NULL, AV_LOG_ERROR, "Cannot obtain size of file %s\n", path);
ret = AVERROR(EIO);
goto fail;
}
*data = av_malloc(fsize);
if (!*data) {
ret = AVERROR(ENOMEM);
goto fail;
}
ret = avio_read(io, *data, fsize);
if (ret != fsize) {
av_log(NULL, AV_LOG_ERROR, "Error reading file %s\n", path);
ret = ret < 0 ? ret : AVERROR(EIO);
goto fail;
}
*len = fsize;
ret = 0;
fail:
avio_close(io);
if (ret < 0) {
av_freep(data);
*len = 0;
}
return ret;
}
static int filter_opt_apply(AVFilterContext *f, const char *key, const char *val)
{
const AVOption *o = NULL;
int ret;
ret = av_opt_set(f, key, val, AV_OPT_SEARCH_CHILDREN);
if (ret >= 0)
return 0;
if (ret == AVERROR_OPTION_NOT_FOUND && key[0] == '/')
o = av_opt_find(f, key + 1, NULL, 0, AV_OPT_SEARCH_CHILDREN);
if (!o)
goto err_apply;
// key is a valid option name prefixed with '/'
// interpret value as a path from which to load the actual option value
key++;
if (o->type == AV_OPT_TYPE_BINARY) {
uint8_t *data;
int len;
ret = read_binary(val, &data, &len);
if (ret < 0)
goto err_load;
ret = av_opt_set_bin(f, key, data, len, AV_OPT_SEARCH_CHILDREN);
av_freep(&data);
} else {
char *data = file_read(val);
if (!data) {
ret = AVERROR(EIO);
goto err_load;
}
ret = av_opt_set(f, key, data, AV_OPT_SEARCH_CHILDREN);
av_freep(&data);
}
if (ret < 0)
goto err_apply;
return 0;
err_apply:
av_log(NULL, AV_LOG_ERROR,
"Error applying option '%s' to filter '%s': %s\n",
key, f->filter->name, av_err2str(ret));
return ret;
err_load:
av_log(NULL, AV_LOG_ERROR,
"Error loading value for option '%s' from file '%s'\n",
key, val);
return ret;
}
static int graph_opts_apply(AVFilterGraphSegment *seg)
{
for (size_t i = 0; i < seg->nb_chains; i++) {
AVFilterChain *ch = seg->chains[i];
for (size_t j = 0; j < ch->nb_filters; j++) {
AVFilterParams *p = ch->filters[j];
const AVDictionaryEntry *e = NULL;
av_assert0(p->filter);
while ((e = av_dict_iterate(p->opts, e))) {
int ret = filter_opt_apply(p->filter, e->key, e->value);
if (ret < 0)
return ret;
}
av_dict_free(&p->opts);
}
}
return 0;
}
static int graph_parse(AVFilterGraph *graph, const char *desc,
AVFilterInOut **inputs, AVFilterInOut **outputs,
AVBufferRef *hw_device)
{
AVFilterGraphSegment *seg;
int ret;
*inputs = NULL;
*outputs = NULL;
ret = avfilter_graph_segment_parse(graph, desc, 0, &seg);
if (ret < 0)
return ret;
ret = avfilter_graph_segment_create_filters(seg, 0);
if (ret < 0)
goto fail;
if (hw_device) {
for (int i = 0; i < graph->nb_filters; i++) {
AVFilterContext *f = graph->filters[i];
if (!(f->filter->flags & AVFILTER_FLAG_HWDEVICE))
continue;
f->hw_device_ctx = av_buffer_ref(hw_device);
if (!f->hw_device_ctx) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
}
ret = graph_opts_apply(seg);
if (ret < 0)
goto fail;
ret = avfilter_graph_segment_apply(seg, 0, inputs, outputs);
fail:
avfilter_graph_segment_free(&seg);
return ret;
}
// Filters can be configured only if the formats of all inputs are known.
static int ifilter_has_all_input_formats(FilterGraph *fg)
{
for (int i = 0; i < fg->nb_inputs; i++) {
InputFilterPriv *ifp = ifp_from_ifilter(fg->inputs[i]);
if (ifp->format < 0)
return 0;
}
return 1;
}
static int filter_thread(void *arg);
static char *describe_filter_link(FilterGraph *fg, AVFilterInOut *inout, int in)
{
AVFilterContext *ctx = inout->filter_ctx;
AVFilterPad *pads = in ? ctx->input_pads : ctx->output_pads;
int nb_pads = in ? ctx->nb_inputs : ctx->nb_outputs;
if (nb_pads > 1)
return av_strdup(ctx->filter->name);
return av_asprintf("%s:%s", ctx->filter->name,
avfilter_pad_get_name(pads, inout->pad_idx));
}
static const char *ofilter_item_name(void *obj)
{
OutputFilterPriv *ofp = obj;
return ofp->log_name;
}
static const AVClass ofilter_class = {
.class_name = "OutputFilter",
.version = LIBAVUTIL_VERSION_INT,
.item_name = ofilter_item_name,
.parent_log_context_offset = offsetof(OutputFilterPriv, log_parent),
.category = AV_CLASS_CATEGORY_FILTER,
};
static OutputFilter *ofilter_alloc(FilterGraph *fg, enum AVMediaType type)
{
OutputFilterPriv *ofp;
OutputFilter *ofilter;
ofp = allocate_array_elem(&fg->outputs, sizeof(*ofp), &fg->nb_outputs);
if (!ofp)
return NULL;
ofilter = &ofp->ofilter;
ofilter->class = &ofilter_class;
ofp->log_parent = fg;
ofilter->graph = fg;
ofilter->type = type;
ofp->format = -1;
ofp->index = fg->nb_outputs - 1;
snprintf(ofp->log_name, sizeof(ofp->log_name), "%co%d",
av_get_media_type_string(type)[0], ofp->index);
return ofilter;
}
static int ifilter_bind_ist(InputFilter *ifilter, InputStream *ist)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
FilterGraphPriv *fgp = fgp_from_fg(ifilter->graph);
int ret, dec_idx;
av_assert0(!ifp->bound);
ifp->bound = 1;
if (ifp->type != ist->par->codec_type &&
!(ifp->type == AVMEDIA_TYPE_VIDEO && ist->par->codec_type == AVMEDIA_TYPE_SUBTITLE)) {
av_log(fgp, AV_LOG_ERROR, "Tried to connect %s stream to %s filtergraph input\n",
av_get_media_type_string(ist->par->codec_type), av_get_media_type_string(ifp->type));
return AVERROR(EINVAL);
}
ifp->type_src = ist->st->codecpar->codec_type;
ifp->opts.fallback = av_frame_alloc();
if (!ifp->opts.fallback)
return AVERROR(ENOMEM);
dec_idx = ist_filter_add(ist, ifilter, filtergraph_is_simple(ifilter->graph),
&ifp->opts);
if (dec_idx < 0)
return dec_idx;
ret = sch_connect(fgp->sch, SCH_DEC(dec_idx),
SCH_FILTER_IN(fgp->sch_idx, ifp->index));
if (ret < 0)
return ret;
if (ifp->type_src == AVMEDIA_TYPE_SUBTITLE) {
ifp->sub2video.frame = av_frame_alloc();
if (!ifp->sub2video.frame)
return AVERROR(ENOMEM);
ifp->width = ifp->opts.sub2video_width;
ifp->height = ifp->opts.sub2video_height;
/* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
palettes for all rectangles are identical or compatible */
ifp->format = AV_PIX_FMT_RGB32;
ifp->time_base = AV_TIME_BASE_Q;
av_log(fgp, AV_LOG_VERBOSE, "sub2video: using %dx%d canvas\n",
ifp->width, ifp->height);
}
return 0;
}
static int ifilter_bind_dec(InputFilterPriv *ifp, Decoder *dec)
{
FilterGraphPriv *fgp = fgp_from_fg(ifp->ifilter.graph);
int ret, dec_idx;
av_assert0(!ifp->bound);
ifp->bound = 1;
if (ifp->type != dec->type) {
av_log(fgp, AV_LOG_ERROR, "Tried to connect %s decoder to %s filtergraph input\n",
av_get_media_type_string(dec->type), av_get_media_type_string(ifp->type));
return AVERROR(EINVAL);
}
ifp->type_src = ifp->type;
dec_idx = dec_filter_add(dec, &ifp->ifilter, &ifp->opts);
if (dec_idx < 0)
return dec_idx;
ret = sch_connect(fgp->sch, SCH_DEC(dec_idx),
SCH_FILTER_IN(fgp->sch_idx, ifp->index));
if (ret < 0)
return ret;
return 0;
}
static int set_channel_layout(OutputFilterPriv *f, const AVChannelLayout *layouts_allowed,
const AVChannelLayout *layout_requested)
{
int i, err;
if (layout_requested->order != AV_CHANNEL_ORDER_UNSPEC) {
/* Pass the layout through for all orders but UNSPEC */
err = av_channel_layout_copy(&f->ch_layout, layout_requested);
if (err < 0)
return err;
return 0;
}
/* Requested layout is of order UNSPEC */
if (!layouts_allowed) {
/* Use the default native layout for the requested amount of channels when the
encoder doesn't have a list of supported layouts */
av_channel_layout_default(&f->ch_layout, layout_requested->nb_channels);
return 0;
}
/* Encoder has a list of supported layouts. Pick the first layout in it with the
same amount of channels as the requested layout */
for (i = 0; layouts_allowed[i].nb_channels; i++) {
if (layouts_allowed[i].nb_channels == layout_requested->nb_channels)
break;
}
if (layouts_allowed[i].nb_channels) {
/* Use it if one is found */
err = av_channel_layout_copy(&f->ch_layout, &layouts_allowed[i]);
if (err < 0)
return err;
return 0;
}
/* If no layout for the amount of channels requested was found, use the default
native layout for it. */
av_channel_layout_default(&f->ch_layout, layout_requested->nb_channels);
return 0;
}
int ofilter_bind_ost(OutputFilter *ofilter, OutputStream *ost,
unsigned sched_idx_enc,
const OutputFilterOptions *opts)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
FilterGraph *fg = ofilter->graph;
FilterGraphPriv *fgp = fgp_from_fg(fg);
int ret;
av_assert0(!ofilter->bound);
av_assert0(ofilter->type == ost->type);
ofilter->bound = 1;
av_freep(&ofilter->linklabel);
ofp->flags = opts->flags;
ofp->ts_offset = opts->ts_offset;
ofp->enc_timebase = opts->output_tb;
ofp->trim_start_us = opts->trim_start_us;
ofp->trim_duration_us = opts->trim_duration_us;
ofp->name = av_strdup(opts->name);
if (!ofp->name)
return AVERROR(EINVAL);
ret = av_dict_copy(&ofp->sws_opts, opts->sws_opts, 0);
if (ret < 0)
return ret;
ret = av_dict_copy(&ofp->swr_opts, opts->swr_opts, 0);
if (ret < 0)
return ret;
if (opts->flags & OFILTER_FLAG_AUDIO_24BIT)
av_dict_set(&ofp->swr_opts, "output_sample_bits", "24", 0);
if (fgp->is_simple) {
// for simple filtergraph there is just one output,
// so use only graph-level information for logging
ofp->log_parent = NULL;
av_strlcpy(ofp->log_name, fgp->log_name, sizeof(ofp->log_name));
} else
av_strlcatf(ofp->log_name, sizeof(ofp->log_name), "->%s", ofp->name);
switch (ofilter->type) {
case AVMEDIA_TYPE_VIDEO:
ofp->width = opts->width;
ofp->height = opts->height;
if (opts->format != AV_PIX_FMT_NONE) {
ofp->format = opts->format;
} else if (opts->pix_fmts)
ofp->formats = opts->pix_fmts;
else if (opts->enc)
ofp->formats = opts->enc->pix_fmts;
fgp->disable_conversions |= !!(ofp->flags & OFILTER_FLAG_DISABLE_CONVERT);
ofp->fps.last_frame = av_frame_alloc();
if (!ofp->fps.last_frame)
return AVERROR(ENOMEM);
ofp->fps.vsync_method = opts->vsync_method;
ofp->fps.framerate = ost->frame_rate;
ofp->fps.framerate_max = ost->max_frame_rate;
ofp->fps.framerate_supported = ost->force_fps && opts->enc ?
NULL : opts->enc->supported_framerates;
// reduce frame rate for mpeg4 to be within the spec limits
if (opts->enc && opts->enc->id == AV_CODEC_ID_MPEG4)
ofp->fps.framerate_clip = 65535;
ofp->fps.dup_warning = 1000;
break;
case AVMEDIA_TYPE_AUDIO:
if (opts->format != AV_SAMPLE_FMT_NONE) {
ofp->format = opts->format;
} else if (opts->enc) {
ofp->formats = opts->enc->sample_fmts;
}
if (opts->sample_rate) {
ofp->sample_rate = opts->sample_rate;
} else if (opts->enc) {
ofp->sample_rates = opts->enc->supported_samplerates;
}
if (opts->ch_layout.nb_channels) {
int ret = set_channel_layout(ofp, opts->enc ? opts->enc->ch_layouts : NULL,
&opts->ch_layout);
if (ret < 0)
return ret;
} else if (opts->enc) {
ofp->ch_layouts = opts->enc->ch_layouts;
}
break;
}
ret = sch_connect(fgp->sch, SCH_FILTER_OUT(fgp->sch_idx, ofp->index),
SCH_ENC(sched_idx_enc));
if (ret < 0)
return ret;
return 0;
}
static int ofilter_bind_ifilter(OutputFilter *ofilter, InputFilterPriv *ifp,
const OutputFilterOptions *opts)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
av_assert0(!ofilter->bound);
av_assert0(ofilter->type == ifp->type);
ofilter->bound = 1;
av_freep(&ofilter->linklabel);
ofp->name = av_strdup(opts->name);
if (!ofp->name)
return AVERROR(EINVAL);
av_strlcatf(ofp->log_name, sizeof(ofp->log_name), "->%s", ofp->name);
return 0;
}
static int ifilter_bind_fg(InputFilterPriv *ifp, FilterGraph *fg_src, int out_idx)
{
FilterGraphPriv *fgp = fgp_from_fg(ifp->ifilter.graph);
OutputFilter *ofilter_src = fg_src->outputs[out_idx];
OutputFilterOptions opts;
char name[32];
int ret;
av_assert0(!ifp->bound);
ifp->bound = 1;
if (ifp->type != ofilter_src->type) {
av_log(fgp, AV_LOG_ERROR, "Tried to connect %s output to %s input\n",
av_get_media_type_string(ofilter_src->type),
av_get_media_type_string(ifp->type));
return AVERROR(EINVAL);
}
ifp->type_src = ifp->type;
memset(&opts, 0, sizeof(opts));
snprintf(name, sizeof(name), "fg:%d:%d", fgp->fg.index, ifp->index);
opts.name = name;
ret = ofilter_bind_ifilter(ofilter_src, ifp, &opts);
if (ret < 0)
return ret;
ret = sch_connect(fgp->sch, SCH_FILTER_OUT(fg_src->index, out_idx),
SCH_FILTER_IN(fgp->sch_idx, ifp->index));
if (ret < 0)
return ret;
return 0;
}
static InputFilter *ifilter_alloc(FilterGraph *fg)
{
InputFilterPriv *ifp;
InputFilter *ifilter;
ifp = allocate_array_elem(&fg->inputs, sizeof(*ifp), &fg->nb_inputs);
if (!ifp)
return NULL;
ifilter = &ifp->ifilter;
ifilter->graph = fg;
ifp->frame = av_frame_alloc();
if (!ifp->frame)
return NULL;
ifp->index = fg->nb_inputs - 1;
ifp->format = -1;
ifp->color_space = AVCOL_SPC_UNSPECIFIED;
ifp->color_range = AVCOL_RANGE_UNSPECIFIED;
ifp->frame_queue = av_fifo_alloc2(8, sizeof(AVFrame*), AV_FIFO_FLAG_AUTO_GROW);
if (!ifp->frame_queue)
return NULL;
return ifilter;
}
void fg_free(FilterGraph **pfg)
{
FilterGraph *fg = *pfg;
FilterGraphPriv *fgp;
if (!fg)
return;
fgp = fgp_from_fg(fg);
for (int j = 0; j < fg->nb_inputs; j++) {
InputFilter *ifilter = fg->inputs[j];
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
if (ifp->frame_queue) {
AVFrame *frame;
while (av_fifo_read(ifp->frame_queue, &frame, 1) >= 0)
av_frame_free(&frame);
av_fifo_freep2(&ifp->frame_queue);
}
av_frame_free(&ifp->sub2video.frame);
av_frame_free(&ifp->frame);
av_frame_free(&ifp->opts.fallback);
av_buffer_unref(&ifp->hw_frames_ctx);
av_freep(&ifp->linklabel);
av_freep(&ifp->opts.name);
av_freep(&ifilter->name);
av_freep(&fg->inputs[j]);
}
av_freep(&fg->inputs);
for (int j = 0; j < fg->nb_outputs; j++) {
OutputFilter *ofilter = fg->outputs[j];
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
av_frame_free(&ofp->fps.last_frame);
av_dict_free(&ofp->sws_opts);
av_dict_free(&ofp->swr_opts);
av_freep(&ofilter->linklabel);
av_freep(&ofilter->name);
av_freep(&ofilter->apad);
av_freep(&ofp->name);
av_channel_layout_uninit(&ofp->ch_layout);
av_freep(&fg->outputs[j]);
}
av_freep(&fg->outputs);
av_freep(&fgp->graph_desc);
av_freep(&fgp->nb_threads);
av_frame_free(&fgp->frame);
av_frame_free(&fgp->frame_enc);
av_freep(pfg);
}
static const char *fg_item_name(void *obj)
{
const FilterGraphPriv *fgp = obj;
return fgp->log_name;
}
static const AVClass fg_class = {
.class_name = "FilterGraph",
.version = LIBAVUTIL_VERSION_INT,
.item_name = fg_item_name,
.category = AV_CLASS_CATEGORY_FILTER,
};
int fg_create(FilterGraph **pfg, char *graph_desc, Scheduler *sch)
{
FilterGraphPriv *fgp;
FilterGraph *fg;
AVFilterInOut *inputs, *outputs;
AVFilterGraph *graph;
int ret = 0;
fgp = av_mallocz(sizeof(*fgp));
if (!fgp)
return AVERROR(ENOMEM);
fg = &fgp->fg;
if (pfg) {
*pfg = fg;
fg->index = -1;
} else {
ret = av_dynarray_add_nofree(&filtergraphs, &nb_filtergraphs, fgp);
if (ret < 0) {
av_freep(&fgp);
return ret;
}
fg->index = nb_filtergraphs - 1;
}
fg->class = &fg_class;
fgp->graph_desc = graph_desc;
fgp->disable_conversions = !auto_conversion_filters;
fgp->sch = sch;
snprintf(fgp->log_name, sizeof(fgp->log_name), "fc#%d", fg->index);
fgp->frame = av_frame_alloc();
fgp->frame_enc = av_frame_alloc();
if (!fgp->frame || !fgp->frame_enc)
return AVERROR(ENOMEM);
/* this graph is only used for determining the kinds of inputs
* and outputs we have, and is discarded on exit from this function */
graph = avfilter_graph_alloc();
if (!graph)
return AVERROR(ENOMEM);;
graph->nb_threads = 1;
ret = graph_parse(graph, fgp->graph_desc, &inputs, &outputs, NULL);
if (ret < 0)
goto fail;
for (unsigned i = 0; i < graph->nb_filters; i++) {
const AVFilter *f = graph->filters[i]->filter;
if (!avfilter_filter_pad_count(f, 0) &&
!(f->flags & AVFILTER_FLAG_DYNAMIC_INPUTS)) {
fgp->have_sources = 1;
break;
}
}
for (AVFilterInOut *cur = inputs; cur; cur = cur->next) {
InputFilter *const ifilter = ifilter_alloc(fg);
InputFilterPriv *ifp;
if (!ifilter) {
ret = AVERROR(ENOMEM);
goto fail;
}
ifp = ifp_from_ifilter(ifilter);
ifp->linklabel = cur->name;
cur->name = NULL;
ifp->type = avfilter_pad_get_type(cur->filter_ctx->input_pads,
cur->pad_idx);
if (ifp->type != AVMEDIA_TYPE_VIDEO && ifp->type != AVMEDIA_TYPE_AUDIO) {
av_log(fg, AV_LOG_FATAL, "Only video and audio filters supported "
"currently.\n");
ret = AVERROR(ENOSYS);
goto fail;
}
ifilter->name = describe_filter_link(fg, cur, 1);
if (!ifilter->name) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
for (AVFilterInOut *cur = outputs; cur; cur = cur->next) {
const enum AVMediaType type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
cur->pad_idx);
OutputFilter *const ofilter = ofilter_alloc(fg, type);
if (!ofilter) {
ret = AVERROR(ENOMEM);
goto fail;
}
ofilter->linklabel = cur->name;
cur->name = NULL;
ofilter->name = describe_filter_link(fg, cur, 0);
if (!ofilter->name) {
ret = AVERROR(ENOMEM);
goto fail;
}
}
if (!fg->nb_outputs) {
av_log(fg, AV_LOG_FATAL, "A filtergraph has zero outputs, this is not supported\n");
ret = AVERROR(ENOSYS);
goto fail;
}
ret = sch_add_filtergraph(sch, fg->nb_inputs, fg->nb_outputs,
filter_thread, fgp);
if (ret < 0)
goto fail;
fgp->sch_idx = ret;
fail:
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
avfilter_graph_free(&graph);
if (ret < 0)
return ret;
return 0;
}
int init_simple_filtergraph(InputStream *ist, OutputStream *ost,
char *graph_desc,
Scheduler *sch, unsigned sched_idx_enc,
const OutputFilterOptions *opts)
{
FilterGraph *fg;
FilterGraphPriv *fgp;
int ret;
ret = fg_create(&fg, graph_desc, sch);
if (ret < 0)
return ret;
ost->fg_simple = fg;
fgp = fgp_from_fg(fg);
fgp->is_simple = 1;
snprintf(fgp->log_name, sizeof(fgp->log_name), "%cf%s",
av_get_media_type_string(ost->type)[0], opts->name);
if (fg->nb_inputs != 1 || fg->nb_outputs != 1) {
av_log(fg, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
"to have exactly 1 input and 1 output. "
"However, it had %d input(s) and %d output(s). Please adjust, "
"or use a complex filtergraph (-filter_complex) instead.\n",
graph_desc, fg->nb_inputs, fg->nb_outputs);
return AVERROR(EINVAL);
}
if (fg->outputs[0]->type != ost->type) {
av_log(fg, AV_LOG_ERROR, "Filtergraph has a %s output, cannot connect "
"it to %s output stream\n",
av_get_media_type_string(fg->outputs[0]->type),
av_get_media_type_string(ost->type));
return AVERROR(EINVAL);
}
ost->filter = fg->outputs[0];
ret = ifilter_bind_ist(fg->inputs[0], ist);
if (ret < 0)
return ret;
ret = ofilter_bind_ost(fg->outputs[0], ost, sched_idx_enc, opts);
if (ret < 0)
return ret;
if (opts->nb_threads) {
av_freep(&fgp->nb_threads);
fgp->nb_threads = av_strdup(opts->nb_threads);
if (!fgp->nb_threads)
return AVERROR(ENOMEM);
}
return 0;
}
static int fg_complex_bind_input(FilterGraph *fg, InputFilter *ifilter)
{
FilterGraphPriv *fgp = fgp_from_fg(fg);
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
InputStream *ist = NULL;
enum AVMediaType type = ifp->type;
int i, ret;
if (ifp->linklabel && !strncmp(ifp->linklabel, "dec:", 4)) {
// bind to a standalone decoder
int dec_idx;
dec_idx = strtol(ifp->linklabel + 4, NULL, 0);
if (dec_idx < 0 || dec_idx >= nb_decoders) {
av_log(fg, AV_LOG_ERROR, "Invalid decoder index %d in filtergraph description %s\n",
dec_idx, fgp->graph_desc);
return AVERROR(EINVAL);
}
ret = ifilter_bind_dec(ifp, decoders[dec_idx]);
if (ret < 0)
av_log(fg, AV_LOG_ERROR, "Error binding a decoder to filtergraph input %s\n",
ifilter->name);
return ret;
} else if (ifp->linklabel) {
AVFormatContext *s;
AVStream *st = NULL;
char *p;
int file_idx;
// try finding an unbound filtergraph output with this label
for (int i = 0; i < nb_filtergraphs; i++) {
FilterGraph *fg_src = filtergraphs[i];
if (fg == fg_src)
continue;
for (int j = 0; j < fg_src->nb_outputs; j++) {
OutputFilter *ofilter = fg_src->outputs[j];
if (!ofilter->bound && ofilter->linklabel &&
!strcmp(ofilter->linklabel, ifp->linklabel)) {
av_log(fg, AV_LOG_VERBOSE,
"Binding input with label '%s' to filtergraph output %d:%d\n",
ifp->linklabel, i, j);
ret = ifilter_bind_fg(ifp, fg_src, j);
if (ret < 0)
av_log(fg, AV_LOG_ERROR, "Error binding filtergraph input %s\n",
ifp->linklabel);
return ret;
}
}
}
// bind to an explicitly specified demuxer stream
file_idx = strtol(ifp->linklabel, &p, 0);
if (file_idx < 0 || file_idx >= nb_input_files) {
av_log(fg, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
file_idx, fgp->graph_desc);
return AVERROR(EINVAL);
}
s = input_files[file_idx]->ctx;
for (i = 0; i < s->nb_streams; i++) {
enum AVMediaType stream_type = s->streams[i]->codecpar->codec_type;
if (stream_type != type &&
!(stream_type == AVMEDIA_TYPE_SUBTITLE &&
type == AVMEDIA_TYPE_VIDEO /* sub2video hack */))
continue;
if (check_stream_specifier(s, s->streams[i], *p == ':' ? p + 1 : p) == 1) {
st = s->streams[i];
break;
}
}
if (!st) {
av_log(fg, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
"matches no streams.\n", p, fgp->graph_desc);
return AVERROR(EINVAL);
}
ist = input_files[file_idx]->streams[st->index];
av_log(fg, AV_LOG_VERBOSE,
"Binding input with label '%s' to input stream %d:%d\n",
ifp->linklabel, ist->file->index, ist->index);
} else {
ist = ist_find_unused(type);
if (!ist) {
av_log(fg, AV_LOG_FATAL, "Cannot find a matching stream for "
"unlabeled input pad %s\n", ifilter->name);
return AVERROR(EINVAL);
}
av_log(fg, AV_LOG_VERBOSE,
"Binding unlabeled input %d to input stream %d:%d\n",
ifp->index, ist->file->index, ist->index);
}
av_assert0(ist);
ret = ifilter_bind_ist(ifilter, ist);
if (ret < 0) {
av_log(fg, AV_LOG_ERROR,
"Error binding an input stream to complex filtergraph input %s.\n",
ifilter->name);
return ret;
}
return 0;
}
static int bind_inputs(FilterGraph *fg)
{
// bind filtergraph inputs to input streams or other filtergraphs
for (int i = 0; i < fg->nb_inputs; i++) {
InputFilterPriv *ifp = ifp_from_ifilter(fg->inputs[i]);
int ret;
if (ifp->bound)
continue;
ret = fg_complex_bind_input(fg, &ifp->ifilter);
if (ret < 0)
return ret;
}
return 0;
}
int fg_finalise_bindings(void)
{
int ret;
for (int i = 0; i < nb_filtergraphs; i++) {
ret = bind_inputs(filtergraphs[i]);
if (ret < 0)
return ret;
}
// check that all outputs were bound
for (int i = 0; i < nb_filtergraphs; i++) {
FilterGraph *fg = filtergraphs[i];
for (int j = 0; j < fg->nb_outputs; j++) {
OutputFilter *output = fg->outputs[j];
if (!output->bound) {
av_log(filtergraphs[j], AV_LOG_FATAL,
"Filter %s has an unconnected output\n", output->name);
return AVERROR(EINVAL);
}
}
}
return 0;
}
static int insert_trim(int64_t start_time, int64_t duration,
AVFilterContext **last_filter, int *pad_idx,
const char *filter_name)
{
AVFilterGraph *graph = (*last_filter)->graph;
AVFilterContext *ctx;
const AVFilter *trim;
enum AVMediaType type = avfilter_pad_get_type((*last_filter)->output_pads, *pad_idx);
const char *name = (type == AVMEDIA_TYPE_VIDEO) ? "trim" : "atrim";
int ret = 0;
if (duration == INT64_MAX && start_time == AV_NOPTS_VALUE)
return 0;
trim = avfilter_get_by_name(name);
if (!trim) {
av_log(NULL, AV_LOG_ERROR, "%s filter not present, cannot limit "
"recording time.\n", name);
return AVERROR_FILTER_NOT_FOUND;
}
ctx = avfilter_graph_alloc_filter(graph, trim, filter_name);
if (!ctx)
return AVERROR(ENOMEM);
if (duration != INT64_MAX) {
ret = av_opt_set_int(ctx, "durationi", duration,
AV_OPT_SEARCH_CHILDREN);
}
if (ret >= 0 && start_time != AV_NOPTS_VALUE) {
ret = av_opt_set_int(ctx, "starti", start_time,
AV_OPT_SEARCH_CHILDREN);
}
if (ret < 0) {
av_log(ctx, AV_LOG_ERROR, "Error configuring the %s filter", name);
return ret;
}
ret = avfilter_init_str(ctx, NULL);
if (ret < 0)
return ret;
ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
if (ret < 0)
return ret;
*last_filter = ctx;
*pad_idx = 0;
return 0;
}
static int insert_filter(AVFilterContext **last_filter, int *pad_idx,
const char *filter_name, const char *args)
{
AVFilterGraph *graph = (*last_filter)->graph;
AVFilterContext *ctx;
int ret;
ret = avfilter_graph_create_filter(&ctx,
avfilter_get_by_name(filter_name),
filter_name, args, NULL, graph);
if (ret < 0)
return ret;
ret = avfilter_link(*last_filter, *pad_idx, ctx, 0);
if (ret < 0)
return ret;
*last_filter = ctx;
*pad_idx = 0;
return 0;
}
static int configure_output_video_filter(FilterGraph *fg, AVFilterGraph *graph,
OutputFilter *ofilter, AVFilterInOut *out)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
AVFilterContext *last_filter = out->filter_ctx;
AVBPrint bprint;
int pad_idx = out->pad_idx;
int ret;
const char *pix_fmts;
char name[255];
snprintf(name, sizeof(name), "out_%s", ofp->name);
ret = avfilter_graph_create_filter(&ofp->filter,
avfilter_get_by_name("buffersink"),
name, NULL, NULL, graph);
if (ret < 0)
return ret;
if ((ofp->width || ofp->height) && (ofp->flags & OFILTER_FLAG_AUTOSCALE)) {
char args[255];
AVFilterContext *filter;
const AVDictionaryEntry *e = NULL;
snprintf(args, sizeof(args), "%d:%d",
ofp->width, ofp->height);
while ((e = av_dict_iterate(ofp->sws_opts, e))) {
av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
}
snprintf(name, sizeof(name), "scaler_out_%s", ofp->name);
if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
name, args, NULL, graph)) < 0)
return ret;
if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
return ret;
last_filter = filter;
pad_idx = 0;
}
av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
ret = choose_pix_fmts(ofilter, &bprint, &pix_fmts);
if (ret < 0)
return ret;
if (pix_fmts) {
AVFilterContext *filter;
ret = avfilter_graph_create_filter(&filter,
avfilter_get_by_name("format"),
"format", pix_fmts, NULL, graph);
av_bprint_finalize(&bprint, NULL);
if (ret < 0)
return ret;
if ((ret = avfilter_link(last_filter, pad_idx, filter, 0)) < 0)
return ret;
last_filter = filter;
pad_idx = 0;
}
snprintf(name, sizeof(name), "trim_out_%s", ofp->name);
ret = insert_trim(ofp->trim_start_us, ofp->trim_duration_us,
&last_filter, &pad_idx, name);
if (ret < 0)
return ret;
if ((ret = avfilter_link(last_filter, pad_idx, ofp->filter, 0)) < 0)
return ret;
return 0;
}
static int configure_output_audio_filter(FilterGraph *fg, AVFilterGraph *graph,
OutputFilter *ofilter, AVFilterInOut *out)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
AVFilterContext *last_filter = out->filter_ctx;
int pad_idx = out->pad_idx;
AVBPrint args;
char name[255];
int ret;
snprintf(name, sizeof(name), "out_%s", ofp->name);
ret = avfilter_graph_create_filter(&ofp->filter,
avfilter_get_by_name("abuffersink"),
name, NULL, NULL, graph);
if (ret < 0)
return ret;
if ((ret = av_opt_set_int(ofp->filter, "all_channel_counts", 1, AV_OPT_SEARCH_CHILDREN)) < 0)
return ret;
#define AUTO_INSERT_FILTER(opt_name, filter_name, arg) do { \
AVFilterContext *filt_ctx; \
\
av_log(ofilter, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
"similarly to -af " filter_name "=%s.\n", arg); \
\
ret = avfilter_graph_create_filter(&filt_ctx, \
avfilter_get_by_name(filter_name), \
filter_name, arg, NULL, graph); \
if (ret < 0) \
goto fail; \
\
ret = avfilter_link(last_filter, pad_idx, filt_ctx, 0); \
if (ret < 0) \
goto fail; \
\
last_filter = filt_ctx; \
pad_idx = 0; \
} while (0)
av_bprint_init(&args, 0, AV_BPRINT_SIZE_UNLIMITED);
choose_sample_fmts(ofp, &args);
choose_sample_rates(ofp, &args);
choose_channel_layouts(ofp, &args);
if (!av_bprint_is_complete(&args)) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (args.len) {
AVFilterContext *format;
snprintf(name, sizeof(name), "format_out_%s", ofp->name);
ret = avfilter_graph_create_filter(&format,
avfilter_get_by_name("aformat"),
name, args.str, NULL, graph);
if (ret < 0)
goto fail;
ret = avfilter_link(last_filter, pad_idx, format, 0);
if (ret < 0)
goto fail;
last_filter = format;
pad_idx = 0;
}
if (ofilter->apad)
AUTO_INSERT_FILTER("-apad", "apad", ofilter->apad);
snprintf(name, sizeof(name), "trim for output %s", ofp->name);
ret = insert_trim(ofp->trim_start_us, ofp->trim_duration_us,
&last_filter, &pad_idx, name);
if (ret < 0)
goto fail;
if ((ret = avfilter_link(last_filter, pad_idx, ofp->filter, 0)) < 0)
goto fail;
fail:
av_bprint_finalize(&args, NULL);
return ret;
}
static int configure_output_filter(FilterGraph *fg, AVFilterGraph *graph,
OutputFilter *ofilter, AVFilterInOut *out)
{
switch (ofilter->type) {
case AVMEDIA_TYPE_VIDEO: return configure_output_video_filter(fg, graph, ofilter, out);
case AVMEDIA_TYPE_AUDIO: return configure_output_audio_filter(fg, graph, ofilter, out);
default: av_assert0(0); return 0;
}
}
static void sub2video_prepare(InputFilterPriv *ifp)
{
ifp->sub2video.last_pts = INT64_MIN;
ifp->sub2video.end_pts = INT64_MIN;
/* sub2video structure has been (re-)initialized.
Mark it as such so that the system will be
initialized with the first received heartbeat. */
ifp->sub2video.initialize = 1;
}
static int configure_input_video_filter(FilterGraph *fg, AVFilterGraph *graph,
InputFilter *ifilter, AVFilterInOut *in)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
AVFilterContext *last_filter;
const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
const AVPixFmtDescriptor *desc;
AVRational fr = ifp->opts.framerate;
AVRational sar;
AVBPrint args;
char name[255];
int ret, pad_idx = 0;
AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
if (!par)
return AVERROR(ENOMEM);
if (ifp->type_src == AVMEDIA_TYPE_SUBTITLE)
sub2video_prepare(ifp);
sar = ifp->sample_aspect_ratio;
if(!sar.den)
sar = (AVRational){0,1};
av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
av_bprintf(&args,
"video_size=%dx%d:pix_fmt=%d:time_base=%d/%d:"
"pixel_aspect=%d/%d:colorspace=%d:range=%d",
ifp->width, ifp->height, ifp->format,
ifp->time_base.num, ifp->time_base.den, sar.num, sar.den,
ifp->color_space, ifp->color_range);
if (fr.num && fr.den)
av_bprintf(&args, ":frame_rate=%d/%d", fr.num, fr.den);
snprintf(name, sizeof(name), "graph %d input from stream %s", fg->index,
ifp->opts.name);
if ((ret = avfilter_graph_create_filter(&ifp->filter, buffer_filt, name,
args.str, NULL, graph)) < 0)
goto fail;
par->hw_frames_ctx = ifp->hw_frames_ctx;
ret = av_buffersrc_parameters_set(ifp->filter, par);
if (ret < 0)
goto fail;
av_freep(&par);
last_filter = ifp->filter;
desc = av_pix_fmt_desc_get(ifp->format);
av_assert0(desc);
// TODO: insert hwaccel enabled filters like transpose_vaapi into the graph
ifp->displaymatrix_applied = 0;
if ((ifp->opts.flags & IFILTER_FLAG_AUTOROTATE) &&
!(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) {
int32_t *displaymatrix = ifp->displaymatrix;
double theta;
theta = get_rotation(displaymatrix);
if (fabs(theta - 90) < 1.0) {
ret = insert_filter(&last_filter, &pad_idx, "transpose",
displaymatrix[3] > 0 ? "cclock_flip" : "clock");
} else if (fabs(theta - 180) < 1.0) {
if (displaymatrix[0] < 0) {
ret = insert_filter(&last_filter, &pad_idx, "hflip", NULL);
if (ret < 0)
return ret;
}
if (displaymatrix[4] < 0) {
ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
}
} else if (fabs(theta - 270) < 1.0) {
ret = insert_filter(&last_filter, &pad_idx, "transpose",
displaymatrix[3] < 0 ? "clock_flip" : "cclock");
} else if (fabs(theta) > 1.0) {
char rotate_buf[64];
snprintf(rotate_buf, sizeof(rotate_buf), "%f*PI/180", theta);
ret = insert_filter(&last_filter, &pad_idx, "rotate", rotate_buf);
} else if (fabs(theta) < 1.0) {
if (displaymatrix && displaymatrix[4] < 0) {
ret = insert_filter(&last_filter, &pad_idx, "vflip", NULL);
}
}
if (ret < 0)
return ret;
ifp->displaymatrix_applied = 1;
}
snprintf(name, sizeof(name), "trim_in_%s", ifp->opts.name);
ret = insert_trim(ifp->opts.trim_start_us, ifp->opts.trim_end_us,
&last_filter, &pad_idx, name);
if (ret < 0)
return ret;
if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
return ret;
return 0;
fail:
av_freep(&par);
return ret;
}
static int configure_input_audio_filter(FilterGraph *fg, AVFilterGraph *graph,
InputFilter *ifilter, AVFilterInOut *in)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
AVFilterContext *last_filter;
const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
AVBPrint args;
char name[255];
int ret, pad_idx = 0;
av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
ifp->time_base.num, ifp->time_base.den,
ifp->sample_rate,
av_get_sample_fmt_name(ifp->format));
if (av_channel_layout_check(&ifp->ch_layout) &&
ifp->ch_layout.order != AV_CHANNEL_ORDER_UNSPEC) {
av_bprintf(&args, ":channel_layout=");
av_channel_layout_describe_bprint(&ifp->ch_layout, &args);
} else
av_bprintf(&args, ":channels=%d", ifp->ch_layout.nb_channels);
snprintf(name, sizeof(name), "graph_%d_in_%s", fg->index, ifp->opts.name);
if ((ret = avfilter_graph_create_filter(&ifp->filter, abuffer_filt,
name, args.str, NULL,
graph)) < 0)
return ret;
last_filter = ifp->filter;
snprintf(name, sizeof(name), "trim for input stream %s", ifp->opts.name);
ret = insert_trim(ifp->opts.trim_start_us, ifp->opts.trim_end_us,
&last_filter, &pad_idx, name);
if (ret < 0)
return ret;
if ((ret = avfilter_link(last_filter, 0, in->filter_ctx, in->pad_idx)) < 0)
return ret;
return 0;
}
static int configure_input_filter(FilterGraph *fg, AVFilterGraph *graph,
InputFilter *ifilter, AVFilterInOut *in)
{
switch (ifp_from_ifilter(ifilter)->type) {
case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, graph, ifilter, in);
case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, graph, ifilter, in);
default: av_assert0(0); return 0;
}
}
static void cleanup_filtergraph(FilterGraph *fg, FilterGraphThread *fgt)
{
for (int i = 0; i < fg->nb_outputs; i++)
ofp_from_ofilter(fg->outputs[i])->filter = NULL;
for (int i = 0; i < fg->nb_inputs; i++)
ifp_from_ifilter(fg->inputs[i])->filter = NULL;
avfilter_graph_free(&fgt->graph);
}
static int filter_is_buffersrc(const AVFilterContext *f)
{
return f->nb_inputs == 0 &&
(!strcmp(f->filter->name, "buffer") ||
!strcmp(f->filter->name, "abuffer"));
}
static int graph_is_meta(AVFilterGraph *graph)
{
for (unsigned i = 0; i < graph->nb_filters; i++) {
const AVFilterContext *f = graph->filters[i];
/* in addition to filters flagged as meta, also
* disregard sinks and buffersources (but not other sources,
* since they introduce data we are not aware of)
*/
if (!((f->filter->flags & AVFILTER_FLAG_METADATA_ONLY) ||
f->nb_outputs == 0 ||
filter_is_buffersrc(f)))
return 0;
}
return 1;
}
static int sub2video_frame(InputFilter *ifilter, AVFrame *frame, int buffer);
static int configure_filtergraph(FilterGraph *fg, FilterGraphThread *fgt)
{
FilterGraphPriv *fgp = fgp_from_fg(fg);
AVBufferRef *hw_device;
AVFilterInOut *inputs, *outputs, *cur;
int ret, i, simple = filtergraph_is_simple(fg);
int have_input_eof = 0;
const char *graph_desc = fgp->graph_desc;
cleanup_filtergraph(fg, fgt);
fgt->graph = avfilter_graph_alloc();
if (!fgt->graph)
return AVERROR(ENOMEM);
if (simple) {
OutputFilterPriv *ofp = ofp_from_ofilter(fg->outputs[0]);
if (filter_nbthreads) {
ret = av_opt_set(fgt->graph, "threads", filter_nbthreads, 0);
if (ret < 0)
goto fail;
} else if (fgp->nb_threads) {
ret = av_opt_set(fgt->graph, "threads", fgp->nb_threads, 0);
if (ret < 0)
return ret;
}
if (av_dict_count(ofp->sws_opts)) {
ret = av_dict_get_string(ofp->sws_opts,
&fgt->graph->scale_sws_opts,
'=', ':');
if (ret < 0)
goto fail;
}
if (av_dict_count(ofp->swr_opts)) {
char *args;
ret = av_dict_get_string(ofp->swr_opts, &args, '=', ':');
if (ret < 0)
goto fail;
av_opt_set(fgt->graph, "aresample_swr_opts", args, 0);
av_free(args);
}
} else {
fgt->graph->nb_threads = filter_complex_nbthreads;
}
hw_device = hw_device_for_filter();
if ((ret = graph_parse(fgt->graph, graph_desc, &inputs, &outputs, hw_device)) < 0)
goto fail;
for (cur = inputs, i = 0; cur; cur = cur->next, i++)
if ((ret = configure_input_filter(fg, fgt->graph, fg->inputs[i], cur)) < 0) {
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
goto fail;
}
avfilter_inout_free(&inputs);
for (cur = outputs, i = 0; cur; cur = cur->next, i++) {
ret = configure_output_filter(fg, fgt->graph, fg->outputs[i], cur);
if (ret < 0) {
avfilter_inout_free(&outputs);
goto fail;
}
}
avfilter_inout_free(&outputs);
if (fgp->disable_conversions)
avfilter_graph_set_auto_convert(fgt->graph, AVFILTER_AUTO_CONVERT_NONE);
if ((ret = avfilter_graph_config(fgt->graph, NULL)) < 0)
goto fail;
fgp->is_meta = graph_is_meta(fgt->graph);
/* limit the lists of allowed formats to the ones selected, to
* make sure they stay the same if the filtergraph is reconfigured later */
for (int i = 0; i < fg->nb_outputs; i++) {
OutputFilter *ofilter = fg->outputs[i];
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
AVFilterContext *sink = ofp->filter;
ofp->format = av_buffersink_get_format(sink);
ofp->width = av_buffersink_get_w(sink);
ofp->height = av_buffersink_get_h(sink);
// If the timing parameters are not locked yet, get the tentative values
// here but don't lock them. They will only be used if no output frames
// are ever produced.
if (!ofp->tb_out_locked) {
AVRational fr = av_buffersink_get_frame_rate(sink);
if (ofp->fps.framerate.num <= 0 && ofp->fps.framerate.den <= 0 &&
fr.num > 0 && fr.den > 0)
ofp->fps.framerate = fr;
ofp->tb_out = av_buffersink_get_time_base(sink);
}
ofp->sample_aspect_ratio = av_buffersink_get_sample_aspect_ratio(sink);
ofp->sample_rate = av_buffersink_get_sample_rate(sink);
av_channel_layout_uninit(&ofp->ch_layout);
ret = av_buffersink_get_ch_layout(sink, &ofp->ch_layout);
if (ret < 0)
goto fail;
}
for (int i = 0; i < fg->nb_inputs; i++) {
InputFilterPriv *ifp = ifp_from_ifilter(fg->inputs[i]);
AVFrame *tmp;
while (av_fifo_read(ifp->frame_queue, &tmp, 1) >= 0) {
if (ifp->type_src == AVMEDIA_TYPE_SUBTITLE) {
sub2video_frame(&ifp->ifilter, tmp, !fgt->graph);
} else {
ret = av_buffersrc_add_frame(ifp->filter, tmp);
}
av_frame_free(&tmp);
if (ret < 0)
goto fail;
}
}
/* send the EOFs for the finished inputs */
for (int i = 0; i < fg->nb_inputs; i++) {
InputFilterPriv *ifp = ifp_from_ifilter(fg->inputs[i]);
if (fgt->eof_in[i]) {
ret = av_buffersrc_add_frame(ifp->filter, NULL);
if (ret < 0)
goto fail;
have_input_eof = 1;
}
}
if (have_input_eof) {
// make sure the EOF propagates to the end of the graph
ret = avfilter_graph_request_oldest(fgt->graph);
if (ret < 0 && ret != AVERROR(EAGAIN) && ret != AVERROR_EOF)
goto fail;
}
return 0;
fail:
cleanup_filtergraph(fg, fgt);
return ret;
}
static int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
AVFrameSideData *sd;
int ret;
ret = av_buffer_replace(&ifp->hw_frames_ctx, frame->hw_frames_ctx);
if (ret < 0)
return ret;
ifp->time_base = (ifp->type == AVMEDIA_TYPE_AUDIO) ? (AVRational){ 1, frame->sample_rate } :
(ifp->opts.flags & IFILTER_FLAG_CFR) ? av_inv_q(ifp->opts.framerate) :
frame->time_base;
ifp->format = frame->format;
ifp->width = frame->width;
ifp->height = frame->height;
ifp->sample_aspect_ratio = frame->sample_aspect_ratio;
ifp->color_space = frame->colorspace;
ifp->color_range = frame->color_range;
ifp->sample_rate = frame->sample_rate;
ret = av_channel_layout_copy(&ifp->ch_layout, &frame->ch_layout);
if (ret < 0)
return ret;
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DISPLAYMATRIX);
if (sd)
memcpy(ifp->displaymatrix, sd->data, sizeof(ifp->displaymatrix));
ifp->displaymatrix_present = !!sd;
return 0;
}
int filtergraph_is_simple(const FilterGraph *fg)
{
const FilterGraphPriv *fgp = cfgp_from_cfg(fg);
return fgp->is_simple;
}
static void send_command(FilterGraph *fg, AVFilterGraph *graph,
double time, const char *target,
const char *command, const char *arg, int all_filters)
{
int ret;
if (!graph)
return;
if (time < 0) {
char response[4096];
ret = avfilter_graph_send_command(graph, target, command, arg,
response, sizeof(response),
all_filters ? 0 : AVFILTER_CMD_FLAG_ONE);
fprintf(stderr, "Command reply for stream %d: ret:%d res:\n%s",
fg->index, ret, response);
} else if (!all_filters) {
fprintf(stderr, "Queuing commands only on filters supporting the specific command is unsupported\n");
} else {
ret = avfilter_graph_queue_command(graph, target, command, arg, 0, time);
if (ret < 0)
fprintf(stderr, "Queuing command failed with error %s\n", av_err2str(ret));
}
}
static int choose_input(const FilterGraph *fg, const FilterGraphThread *fgt)
{
int nb_requests, nb_requests_max = -1;
int best_input = -1;
for (int i = 0; i < fg->nb_inputs; i++) {
InputFilter *ifilter = fg->inputs[i];
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
if (fgt->eof_in[i])
continue;
nb_requests = av_buffersrc_get_nb_failed_requests(ifp->filter);
if (nb_requests > nb_requests_max) {
nb_requests_max = nb_requests;
best_input = i;
}
}
av_assert0(best_input >= 0);
return best_input;
}
static int choose_out_timebase(OutputFilterPriv *ofp, AVFrame *frame)
{
OutputFilter *ofilter = &ofp->ofilter;
FPSConvContext *fps = &ofp->fps;
AVRational tb = (AVRational){ 0, 0 };
AVRational fr;
const FrameData *fd;
fd = frame_data_c(frame);
// apply -enc_time_base
if (ofp->enc_timebase.num == ENC_TIME_BASE_DEMUX &&
(fd->dec.tb.num <= 0 || fd->dec.tb.den <= 0)) {
av_log(ofp, AV_LOG_ERROR,
"Demuxing timebase not available - cannot use it for encoding\n");
return AVERROR(EINVAL);
}
switch (ofp->enc_timebase.num) {
case 0: break;
case ENC_TIME_BASE_DEMUX: tb = fd->dec.tb; break;
case ENC_TIME_BASE_FILTER: tb = frame->time_base; break;
default: tb = ofp->enc_timebase; break;
}
if (ofilter->type == AVMEDIA_TYPE_AUDIO) {
tb = tb.num ? tb : (AVRational){ 1, frame->sample_rate };
goto finish;
}
fr = fps->framerate;
if (!fr.num) {
AVRational fr_sink = av_buffersink_get_frame_rate(ofp->filter);
if (fr_sink.num > 0 && fr_sink.den > 0)
fr = fr_sink;
}
if (fps->vsync_method == VSYNC_CFR || fps->vsync_method == VSYNC_VSCFR) {
if (!fr.num && !fps->framerate_max.num) {
fr = (AVRational){25, 1};
av_log(ofp, AV_LOG_WARNING,
"No information "
"about the input framerate is available. Falling "
"back to a default value of 25fps. Use the -r option "
"if you want a different framerate.\n");
}
if (fps->framerate_max.num &&
(av_q2d(fr) > av_q2d(fps->framerate_max) ||
!fr.den))
fr = fps->framerate_max;
}
if (fr.num > 0) {
if (fps->framerate_supported) {
int idx = av_find_nearest_q_idx(fr, fps->framerate_supported);
fr = fps->framerate_supported[idx];
}
if (fps->framerate_clip) {
av_reduce(&fr.num, &fr.den,
fr.num, fr.den, fps->framerate_clip);
}
}
if (!(tb.num > 0 && tb.den > 0))
tb = av_inv_q(fr);
if (!(tb.num > 0 && tb.den > 0))
tb = frame->time_base;
fps->framerate = fr;
finish:
ofp->tb_out = tb;
ofp->tb_out_locked = 1;
return 0;
}
static double adjust_frame_pts_to_encoder_tb(AVFrame *frame, AVRational tb_dst,
int64_t start_time)
{
double float_pts = AV_NOPTS_VALUE; // this is identical to frame.pts but with higher precision
AVRational tb = tb_dst;
AVRational filter_tb = frame->time_base;
const int extra_bits = av_clip(29 - av_log2(tb.den), 0, 16);
if (frame->pts == AV_NOPTS_VALUE)
goto early_exit;
tb.den <<= extra_bits;
float_pts = av_rescale_q(frame->pts, filter_tb, tb) -
av_rescale_q(start_time, AV_TIME_BASE_Q, tb);
float_pts /= 1 << extra_bits;
// when float_pts is not exactly an integer,
// avoid exact midpoints to reduce the chance of rounding differences, this
// can be removed in case the fps code is changed to work with integers
if (float_pts != llrint(float_pts))
float_pts += FFSIGN(float_pts) * 1.0 / (1<<17);
frame->pts = av_rescale_q(frame->pts, filter_tb, tb_dst) -
av_rescale_q(start_time, AV_TIME_BASE_Q, tb_dst);
frame->time_base = tb_dst;
early_exit:
if (debug_ts) {
av_log(NULL, AV_LOG_INFO, "filter -> pts:%s pts_time:%s exact:%f time_base:%d/%d\n",
frame ? av_ts2str(frame->pts) : "NULL",
av_ts2timestr(frame->pts, &tb_dst),
float_pts, tb_dst.num, tb_dst.den);
}
return float_pts;
}
/* Convert frame timestamps to the encoder timebase and decide how many times
* should this (and possibly previous) frame be repeated in order to conform to
* desired target framerate (if any).
*/
static void video_sync_process(OutputFilterPriv *ofp, AVFrame *frame,
int64_t *nb_frames, int64_t *nb_frames_prev)
{
OutputFilter *ofilter = &ofp->ofilter;
FPSConvContext *fps = &ofp->fps;
double delta0, delta, sync_ipts, duration;
if (!frame) {
*nb_frames_prev = *nb_frames = mid_pred(fps->frames_prev_hist[0],
fps->frames_prev_hist[1],
fps->frames_prev_hist[2]);
if (!*nb_frames && fps->last_dropped) {
atomic_fetch_add(&ofilter->nb_frames_drop, 1);
fps->last_dropped++;
}
goto finish;
}
duration = frame->duration * av_q2d(frame->time_base) / av_q2d(ofp->tb_out);
sync_ipts = adjust_frame_pts_to_encoder_tb(frame, ofp->tb_out, ofp->ts_offset);
/* delta0 is the "drift" between the input frame and
* where it would fall in the output. */
delta0 = sync_ipts - ofp->next_pts;
delta = delta0 + duration;
// tracks the number of times the PREVIOUS frame should be duplicated,
// mostly for variable framerate (VFR)
*nb_frames_prev = 0;
/* by default, we output a single frame */
*nb_frames = 1;
if (delta0 < 0 &&
delta > 0 &&
fps->vsync_method != VSYNC_PASSTHROUGH
#if FFMPEG_OPT_VSYNC_DROP
&& fps->vsync_method != VSYNC_DROP
#endif
) {
if (delta0 < -0.6) {
av_log(ofp, AV_LOG_VERBOSE, "Past duration %f too large\n", -delta0);
} else
av_log(ofp, AV_LOG_DEBUG, "Clipping frame in rate conversion by %f\n", -delta0);
sync_ipts = ofp->next_pts;
duration += delta0;
delta0 = 0;
}
switch (fps->vsync_method) {
case VSYNC_VSCFR:
if (fps->frame_number == 0 && delta0 >= 0.5) {
av_log(ofp, AV_LOG_DEBUG, "Not duplicating %d initial frames\n", (int)lrintf(delta0));
delta = duration;
delta0 = 0;
ofp->next_pts = llrint(sync_ipts);
}
case VSYNC_CFR:
// FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
if (frame_drop_threshold && delta < frame_drop_threshold && fps->frame_number) {
*nb_frames = 0;
} else if (delta < -1.1)
*nb_frames = 0;
else if (delta > 1.1) {
*nb_frames = llrintf(delta);
if (delta0 > 1.1)
*nb_frames_prev = llrintf(delta0 - 0.6);
}
frame->duration = 1;
break;
case VSYNC_VFR:
if (delta <= -0.6)
*nb_frames = 0;
else if (delta > 0.6)
ofp->next_pts = llrint(sync_ipts);
frame->duration = llrint(duration);
break;
#if FFMPEG_OPT_VSYNC_DROP
case VSYNC_DROP:
#endif
case VSYNC_PASSTHROUGH:
ofp->next_pts = llrint(sync_ipts);
frame->duration = llrint(duration);
break;
default:
av_assert0(0);
}
finish:
memmove(fps->frames_prev_hist + 1,
fps->frames_prev_hist,
sizeof(fps->frames_prev_hist[0]) * (FF_ARRAY_ELEMS(fps->frames_prev_hist) - 1));
fps->frames_prev_hist[0] = *nb_frames_prev;
if (*nb_frames_prev == 0 && fps->last_dropped) {
atomic_fetch_add(&ofilter->nb_frames_drop, 1);
av_log(ofp, AV_LOG_VERBOSE,
"*** dropping frame %"PRId64" at ts %"PRId64"\n",
fps->frame_number, fps->last_frame->pts);
}
if (*nb_frames > (*nb_frames_prev && fps->last_dropped) + (*nb_frames > *nb_frames_prev)) {
uint64_t nb_frames_dup;
if (*nb_frames > dts_error_threshold * 30) {
av_log(ofp, AV_LOG_ERROR, "%"PRId64" frame duplication too large, skipping\n", *nb_frames - 1);
atomic_fetch_add(&ofilter->nb_frames_drop, 1);
*nb_frames = 0;
return;
}
nb_frames_dup = atomic_fetch_add(&ofilter->nb_frames_dup,
*nb_frames - (*nb_frames_prev && fps->last_dropped) - (*nb_frames > *nb_frames_prev));
av_log(ofp, AV_LOG_VERBOSE, "*** %"PRId64" dup!\n", *nb_frames - 1);
if (nb_frames_dup > fps->dup_warning) {
av_log(ofp, AV_LOG_WARNING, "More than %"PRIu64" frames duplicated\n", fps->dup_warning);
fps->dup_warning *= 10;
}
}
fps->last_dropped = *nb_frames == *nb_frames_prev && frame;
fps->dropped_keyframe |= fps->last_dropped && (frame->flags & AV_FRAME_FLAG_KEY);
}
static int close_output(OutputFilterPriv *ofp, FilterGraphThread *fgt)
{
FilterGraphPriv *fgp = fgp_from_fg(ofp->ofilter.graph);
int ret;
// we are finished and no frames were ever seen at this output,
// at least initialize the encoder with a dummy frame
if (!fgt->got_frame) {
AVFrame *frame = fgt->frame;
FrameData *fd;
frame->time_base = ofp->tb_out;
frame->format = ofp->format;
frame->width = ofp->width;
frame->height = ofp->height;
frame->sample_aspect_ratio = ofp->sample_aspect_ratio;
frame->sample_rate = ofp->sample_rate;
if (ofp->ch_layout.nb_channels) {
ret = av_channel_layout_copy(&frame->ch_layout, &ofp->ch_layout);
if (ret < 0)
return ret;
}
fd = frame_data(frame);
if (!fd)
return AVERROR(ENOMEM);
fd->frame_rate_filter = ofp->fps.framerate;
av_assert0(!frame->buf[0]);
av_log(ofp, AV_LOG_WARNING,
"No filtered frames for output stream, trying to "
"initialize anyway.\n");
ret = sch_filter_send(fgp->sch, fgp->sch_idx, ofp->index, frame);
if (ret < 0) {
av_frame_unref(frame);
return ret;
}
}
fgt->eof_out[ofp->index] = 1;
ret = sch_filter_send(fgp->sch, fgp->sch_idx, ofp->index, NULL);
return (ret == AVERROR_EOF) ? 0 : ret;
}
static int fg_output_frame(OutputFilterPriv *ofp, FilterGraphThread *fgt,
AVFrame *frame)
{
FilterGraphPriv *fgp = fgp_from_fg(ofp->ofilter.graph);
AVFrame *frame_prev = ofp->fps.last_frame;
enum AVMediaType type = ofp->ofilter.type;
int64_t nb_frames = !!frame, nb_frames_prev = 0;
if (type == AVMEDIA_TYPE_VIDEO && (frame || fgt->got_frame))
video_sync_process(ofp, frame, &nb_frames, &nb_frames_prev);
for (int64_t i = 0; i < nb_frames; i++) {
AVFrame *frame_out;
int ret;
if (type == AVMEDIA_TYPE_VIDEO) {
AVFrame *frame_in = (i < nb_frames_prev && frame_prev->buf[0]) ?
frame_prev : frame;
if (!frame_in)
break;
frame_out = fgp->frame_enc;
ret = av_frame_ref(frame_out, frame_in);
if (ret < 0)
return ret;
frame_out->pts = ofp->next_pts;
if (ofp->fps.dropped_keyframe) {
frame_out->flags |= AV_FRAME_FLAG_KEY;
ofp->fps.dropped_keyframe = 0;
}
} else {
frame->pts = (frame->pts == AV_NOPTS_VALUE) ? ofp->next_pts :
av_rescale_q(frame->pts, frame->time_base, ofp->tb_out) -
av_rescale_q(ofp->ts_offset, AV_TIME_BASE_Q, ofp->tb_out);
frame->time_base = ofp->tb_out;
frame->duration = av_rescale_q(frame->nb_samples,
(AVRational){ 1, frame->sample_rate },
ofp->tb_out);
ofp->next_pts = frame->pts + frame->duration;
frame_out = frame;
}
// send the frame to consumers
ret = sch_filter_send(fgp->sch, fgp->sch_idx, ofp->index, frame_out);
if (ret < 0) {
av_frame_unref(frame_out);
if (!fgt->eof_out[ofp->index]) {
fgt->eof_out[ofp->index] = 1;
fgp->nb_outputs_done++;
}
return ret == AVERROR_EOF ? 0 : ret;
}
if (type == AVMEDIA_TYPE_VIDEO) {
ofp->fps.frame_number++;
ofp->next_pts++;
if (i == nb_frames_prev && frame)
frame->flags &= ~AV_FRAME_FLAG_KEY;
}
fgt->got_frame = 1;
}
if (frame && frame_prev) {
av_frame_unref(frame_prev);
av_frame_move_ref(frame_prev, frame);
}
if (!frame)
return close_output(ofp, fgt);
return 0;
}
static int fg_output_step(OutputFilterPriv *ofp, FilterGraphThread *fgt,
AVFrame *frame)
{
FilterGraphPriv *fgp = fgp_from_fg(ofp->ofilter.graph);
AVFilterContext *filter = ofp->filter;
FrameData *fd;
int ret;
ret = av_buffersink_get_frame_flags(filter, frame,
AV_BUFFERSINK_FLAG_NO_REQUEST);
if (ret == AVERROR_EOF && !fgt->eof_out[ofp->index]) {
ret = fg_output_frame(ofp, fgt, NULL);
return (ret < 0) ? ret : 1;
} else if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) {
return 1;
} else if (ret < 0) {
av_log(ofp, AV_LOG_WARNING,
"Error in retrieving a frame from the filtergraph: %s\n",
av_err2str(ret));
return ret;
}
if (fgt->eof_out[ofp->index]) {
av_frame_unref(frame);
return 0;
}
frame->time_base = av_buffersink_get_time_base(filter);
if (debug_ts)
av_log(ofp, AV_LOG_INFO, "filter_raw -> pts:%s pts_time:%s time_base:%d/%d\n",
av_ts2str(frame->pts), av_ts2timestr(frame->pts, &frame->time_base),
frame->time_base.num, frame->time_base.den);
// Choose the output timebase the first time we get a frame.
if (!ofp->tb_out_locked) {
ret = choose_out_timebase(ofp, frame);
if (ret < 0) {
av_log(ofp, AV_LOG_ERROR, "Could not choose an output time base\n");
av_frame_unref(frame);
return ret;
}
}
fd = frame_data(frame);
if (!fd) {
av_frame_unref(frame);
return AVERROR(ENOMEM);
}
fd->wallclock[LATENCY_PROBE_FILTER_POST] = av_gettime_relative();
// only use bits_per_raw_sample passed through from the decoder
// if the filtergraph did not touch the frame data
if (!fgp->is_meta)
fd->bits_per_raw_sample = 0;
if (ofp->ofilter.type == AVMEDIA_TYPE_VIDEO) {
if (!frame->duration) {
AVRational fr = av_buffersink_get_frame_rate(filter);
if (fr.num > 0 && fr.den > 0)
frame->duration = av_rescale_q(1, av_inv_q(fr), frame->time_base);
}
fd->frame_rate_filter = ofp->fps.framerate;
}
ret = fg_output_frame(ofp, fgt, frame);
av_frame_unref(frame);
if (ret < 0)
return ret;
return 0;
}
/* retrieve all frames available at filtergraph outputs
* and send them to consumers */
static int read_frames(FilterGraph *fg, FilterGraphThread *fgt,
AVFrame *frame)
{
FilterGraphPriv *fgp = fgp_from_fg(fg);
int did_step = 0;
// graph not configured, just select the input to request
if (!fgt->graph) {
for (int i = 0; i < fg->nb_inputs; i++) {
InputFilterPriv *ifp = ifp_from_ifilter(fg->inputs[i]);
if (ifp->format < 0 && !fgt->eof_in[i]) {
fgt->next_in = i;
return 0;
}
}
// This state - graph is not configured, but all inputs are either
// initialized or EOF - should be unreachable because sending EOF to a
// filter without even a fallback format should fail
av_assert0(0);
return AVERROR_BUG;
}
while (fgp->nb_outputs_done < fg->nb_outputs) {
int ret;
ret = avfilter_graph_request_oldest(fgt->graph);
if (ret == AVERROR(EAGAIN)) {
fgt->next_in = choose_input(fg, fgt);
break;
} else if (ret < 0) {
if (ret == AVERROR_EOF)
av_log(fg, AV_LOG_VERBOSE, "Filtergraph returned EOF, finishing\n");
else
av_log(fg, AV_LOG_ERROR,
"Error requesting a frame from the filtergraph: %s\n",
av_err2str(ret));
return ret;
}
fgt->next_in = fg->nb_inputs;
// return after one iteration, so that scheduler can rate-control us
if (did_step && fgp->have_sources)
return 0;
/* Reap all buffers present in the buffer sinks */
for (int i = 0; i < fg->nb_outputs; i++) {
OutputFilterPriv *ofp = ofp_from_ofilter(fg->outputs[i]);
ret = 0;
while (!ret) {
ret = fg_output_step(ofp, fgt, frame);
if (ret < 0)
return ret;
}
}
did_step = 1;
}
return (fgp->nb_outputs_done == fg->nb_outputs) ? AVERROR_EOF : 0;
}
static void sub2video_heartbeat(InputFilter *ifilter, int64_t pts, AVRational tb)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
int64_t pts2;
/* subtitles seem to be usually muxed ahead of other streams;
if not, subtracting a larger time here is necessary */
pts2 = av_rescale_q(pts, tb, ifp->time_base) - 1;
/* do not send the heartbeat frame if the subtitle is already ahead */
if (pts2 <= ifp->sub2video.last_pts)
return;
if (pts2 >= ifp->sub2video.end_pts || ifp->sub2video.initialize)
/* if we have hit the end of the current displayed subpicture,
or if we need to initialize the system, update the
overlayed subpicture and its start/end times */
sub2video_update(ifp, pts2 + 1, NULL);
else
sub2video_push_ref(ifp, pts2);
}
static int sub2video_frame(InputFilter *ifilter, AVFrame *frame, int buffer)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
int ret;
if (buffer) {
AVFrame *tmp;
if (!frame)
return 0;
tmp = av_frame_alloc();
if (!tmp)
return AVERROR(ENOMEM);
av_frame_move_ref(tmp, frame);
ret = av_fifo_write(ifp->frame_queue, &tmp, 1);
if (ret < 0) {
av_frame_free(&tmp);
return ret;
}
return 0;
}
// heartbeat frame
if (frame && !frame->buf[0]) {
sub2video_heartbeat(ifilter, frame->pts, frame->time_base);
return 0;
}
if (!frame) {
if (ifp->sub2video.end_pts < INT64_MAX)
sub2video_update(ifp, INT64_MAX, NULL);
return av_buffersrc_add_frame(ifp->filter, NULL);
}
ifp->width = frame->width ? frame->width : ifp->width;
ifp->height = frame->height ? frame->height : ifp->height;
sub2video_update(ifp, INT64_MIN, (const AVSubtitle*)frame->buf[0]->data);
return 0;
}
static int send_eof(FilterGraphThread *fgt, InputFilter *ifilter,
int64_t pts, AVRational tb)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
int ret;
if (fgt->eof_in[ifp->index])
return 0;
fgt->eof_in[ifp->index] = 1;
if (ifp->filter) {
pts = av_rescale_q_rnd(pts, tb, ifp->time_base,
AV_ROUND_NEAR_INF | AV_ROUND_PASS_MINMAX);
ret = av_buffersrc_close(ifp->filter, pts, AV_BUFFERSRC_FLAG_PUSH);
if (ret < 0)
return ret;
} else {
if (ifp->format < 0) {
// the filtergraph was never configured, use the fallback parameters
ifp->format = ifp->opts.fallback->format;
ifp->sample_rate = ifp->opts.fallback->sample_rate;
ifp->width = ifp->opts.fallback->width;
ifp->height = ifp->opts.fallback->height;
ifp->sample_aspect_ratio = ifp->opts.fallback->sample_aspect_ratio;
ifp->color_space = ifp->opts.fallback->colorspace;
ifp->color_range = ifp->opts.fallback->color_range;
ifp->time_base = ifp->opts.fallback->time_base;
ret = av_channel_layout_copy(&ifp->ch_layout,
&ifp->opts.fallback->ch_layout);
if (ret < 0)
return ret;
if (ifilter_has_all_input_formats(ifilter->graph)) {
ret = configure_filtergraph(ifilter->graph, fgt);
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error initializing filters!\n");
return ret;
}
}
}
if (ifp->format < 0) {
av_log(NULL, AV_LOG_ERROR,
"Cannot determine format of input %s after EOF\n",
ifp->opts.name);
return AVERROR_INVALIDDATA;
}
}
return 0;
}
enum ReinitReason {
VIDEO_CHANGED = (1 << 0),
AUDIO_CHANGED = (1 << 1),
MATRIX_CHANGED = (1 << 2),
HWACCEL_CHANGED = (1 << 3)
};
static const char *unknown_if_null(const char *str)
{
return str ? str : "unknown";
}
static int send_frame(FilterGraph *fg, FilterGraphThread *fgt,
InputFilter *ifilter, AVFrame *frame)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
FrameData *fd;
AVFrameSideData *sd;
int need_reinit = 0, ret;
/* determine if the parameters for this input changed */
switch (ifp->type) {
case AVMEDIA_TYPE_AUDIO:
if (ifp->format != frame->format ||
ifp->sample_rate != frame->sample_rate ||
av_channel_layout_compare(&ifp->ch_layout, &frame->ch_layout))
need_reinit |= AUDIO_CHANGED;
break;
case AVMEDIA_TYPE_VIDEO:
if (ifp->format != frame->format ||
ifp->width != frame->width ||
ifp->height != frame->height ||
ifp->color_space != frame->colorspace ||
ifp->color_range != frame->color_range)
need_reinit |= VIDEO_CHANGED;
break;
}
if (sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DISPLAYMATRIX)) {
if (!ifp->displaymatrix_present ||
memcmp(sd->data, ifp->displaymatrix, sizeof(ifp->displaymatrix)))
need_reinit |= MATRIX_CHANGED;
} else if (ifp->displaymatrix_present)
need_reinit |= MATRIX_CHANGED;
if (!(ifp->opts.flags & IFILTER_FLAG_REINIT) && fgt->graph)
need_reinit = 0;
if (!!ifp->hw_frames_ctx != !!frame->hw_frames_ctx ||
(ifp->hw_frames_ctx && ifp->hw_frames_ctx->data != frame->hw_frames_ctx->data))
need_reinit |= HWACCEL_CHANGED;
if (need_reinit) {
ret = ifilter_parameters_from_frame(ifilter, frame);
if (ret < 0)
return ret;
}
/* (re)init the graph if possible, otherwise buffer the frame and return */
if (need_reinit || !fgt->graph) {
AVFrame *tmp = av_frame_alloc();
if (!tmp)
return AVERROR(ENOMEM);
if (!ifilter_has_all_input_formats(fg)) {
av_frame_move_ref(tmp, frame);
ret = av_fifo_write(ifp->frame_queue, &tmp, 1);
if (ret < 0)
av_frame_free(&tmp);
return ret;
}
ret = fgt->graph ? read_frames(fg, fgt, tmp) : 0;
av_frame_free(&tmp);
if (ret < 0)
return ret;
if (fgt->graph) {
AVBPrint reason;
av_bprint_init(&reason, 0, AV_BPRINT_SIZE_AUTOMATIC);
if (need_reinit & AUDIO_CHANGED) {
const char *sample_format_name = av_get_sample_fmt_name(frame->format);
av_bprintf(&reason, "audio parameters changed to %d Hz, ", frame->sample_rate);
av_channel_layout_describe_bprint(&frame->ch_layout, &reason);
av_bprintf(&reason, ", %s, ", unknown_if_null(sample_format_name));
}
if (need_reinit & VIDEO_CHANGED) {
const char *pixel_format_name = av_get_pix_fmt_name(frame->format);
const char *color_space_name = av_color_space_name(frame->colorspace);
const char *color_range_name = av_color_range_name(frame->color_range);
av_bprintf(&reason, "video parameters changed to %s(%s, %s), %dx%d, ",
unknown_if_null(pixel_format_name), unknown_if_null(color_range_name),
unknown_if_null(color_space_name), frame->width, frame->height);
}
if (need_reinit & MATRIX_CHANGED)
av_bprintf(&reason, "display matrix changed, ");
if (need_reinit & HWACCEL_CHANGED)
av_bprintf(&reason, "hwaccel changed, ");
if (reason.len > 1)
reason.str[reason.len - 2] = '\0'; // remove last comma
av_log(fg, AV_LOG_INFO, "Reconfiguring filter graph%s%s\n", reason.len ? " because " : "", reason.str);
}
ret = configure_filtergraph(fg, fgt);
if (ret < 0) {
av_log(fg, AV_LOG_ERROR, "Error reinitializing filters!\n");
return ret;
}
}
frame->pts = av_rescale_q(frame->pts, frame->time_base, ifp->time_base);
frame->duration = av_rescale_q(frame->duration, frame->time_base, ifp->time_base);
frame->time_base = ifp->time_base;
if (ifp->displaymatrix_applied)
av_frame_remove_side_data(frame, AV_FRAME_DATA_DISPLAYMATRIX);
fd = frame_data(frame);
if (!fd)
return AVERROR(ENOMEM);
fd->wallclock[LATENCY_PROBE_FILTER_PRE] = av_gettime_relative();
ret = av_buffersrc_add_frame_flags(ifp->filter, frame,
AV_BUFFERSRC_FLAG_PUSH);
if (ret < 0) {
av_frame_unref(frame);
if (ret != AVERROR_EOF)
av_log(fg, AV_LOG_ERROR, "Error while filtering: %s\n", av_err2str(ret));
return ret;
}
return 0;
}
static void fg_thread_set_name(const FilterGraph *fg)
{
char name[16];
if (filtergraph_is_simple(fg)) {
OutputFilterPriv *ofp = ofp_from_ofilter(fg->outputs[0]);
snprintf(name, sizeof(name), "%cf%s",
av_get_media_type_string(ofp->ofilter.type)[0],
ofp->name);
} else {
snprintf(name, sizeof(name), "fc%d", fg->index);
}
ff_thread_setname(name);
}
static void fg_thread_uninit(FilterGraphThread *fgt)
{
if (fgt->frame_queue_out) {
AVFrame *frame;
while (av_fifo_read(fgt->frame_queue_out, &frame, 1) >= 0)
av_frame_free(&frame);
av_fifo_freep2(&fgt->frame_queue_out);
}
av_frame_free(&fgt->frame);
av_freep(&fgt->eof_in);
av_freep(&fgt->eof_out);
avfilter_graph_free(&fgt->graph);
memset(fgt, 0, sizeof(*fgt));
}
static int fg_thread_init(FilterGraphThread *fgt, const FilterGraph *fg)
{
memset(fgt, 0, sizeof(*fgt));
fgt->frame = av_frame_alloc();
if (!fgt->frame)
goto fail;
fgt->eof_in = av_calloc(fg->nb_inputs, sizeof(*fgt->eof_in));
if (!fgt->eof_in)
goto fail;
fgt->eof_out = av_calloc(fg->nb_outputs, sizeof(*fgt->eof_out));
if (!fgt->eof_out)
goto fail;
fgt->frame_queue_out = av_fifo_alloc2(1, sizeof(AVFrame*), AV_FIFO_FLAG_AUTO_GROW);
if (!fgt->frame_queue_out)
goto fail;
return 0;
fail:
fg_thread_uninit(fgt);
return AVERROR(ENOMEM);
}
static int filter_thread(void *arg)
{
FilterGraphPriv *fgp = arg;
FilterGraph *fg = &fgp->fg;
FilterGraphThread fgt;
int ret = 0, input_status = 0;
ret = fg_thread_init(&fgt, fg);
if (ret < 0)
goto finish;
fg_thread_set_name(fg);
// if we have all input parameters the graph can now be configured
if (ifilter_has_all_input_formats(fg)) {
ret = configure_filtergraph(fg, &fgt);
if (ret < 0) {
av_log(fg, AV_LOG_ERROR, "Error configuring filter graph: %s\n",
av_err2str(ret));
goto finish;
}
}
while (1) {
InputFilter *ifilter;
InputFilterPriv *ifp;
enum FrameOpaque o;
unsigned input_idx = fgt.next_in;
input_status = sch_filter_receive(fgp->sch, fgp->sch_idx,
&input_idx, fgt.frame);
if (input_status == AVERROR_EOF) {
av_log(fg, AV_LOG_VERBOSE, "Filtering thread received EOF\n");
break;
} else if (input_status == AVERROR(EAGAIN)) {
// should only happen when we didn't request any input
av_assert0(input_idx == fg->nb_inputs);
goto read_frames;
}
av_assert0(input_status >= 0);
o = (intptr_t)fgt.frame->opaque;
o = (intptr_t)fgt.frame->opaque;
// message on the control stream
if (input_idx == fg->nb_inputs) {
FilterCommand *fc;
av_assert0(o == FRAME_OPAQUE_SEND_COMMAND && fgt.frame->buf[0]);
fc = (FilterCommand*)fgt.frame->buf[0]->data;
send_command(fg, fgt.graph, fc->time, fc->target, fc->command, fc->arg,
fc->all_filters);
av_frame_unref(fgt.frame);
continue;
}
// we received an input frame or EOF
ifilter = fg->inputs[input_idx];
ifp = ifp_from_ifilter(ifilter);
if (ifp->type_src == AVMEDIA_TYPE_SUBTITLE) {
int hb_frame = input_status >= 0 && o == FRAME_OPAQUE_SUB_HEARTBEAT;
ret = sub2video_frame(ifilter, (fgt.frame->buf[0] || hb_frame) ? fgt.frame : NULL,
!fgt.graph);
} else if (fgt.frame->buf[0]) {
ret = send_frame(fg, &fgt, ifilter, fgt.frame);
} else {
av_assert1(o == FRAME_OPAQUE_EOF);
ret = send_eof(&fgt, ifilter, fgt.frame->pts, fgt.frame->time_base);
}
av_frame_unref(fgt.frame);
if (ret == AVERROR_EOF) {
av_log(fg, AV_LOG_VERBOSE, "Input %u no longer accepts new data\n",
input_idx);
sch_filter_receive_finish(fgp->sch, fgp->sch_idx, input_idx);
continue;
}
if (ret < 0)
goto finish;
read_frames:
// retrieve all newly avalable frames
ret = read_frames(fg, &fgt, fgt.frame);
if (ret == AVERROR_EOF) {
av_log(fg, AV_LOG_VERBOSE, "All consumers returned EOF\n");
break;
} else if (ret < 0) {
av_log(fg, AV_LOG_ERROR, "Error sending frames to consumers: %s\n",
av_err2str(ret));
goto finish;
}
}
for (unsigned i = 0; i < fg->nb_outputs; i++) {
OutputFilterPriv *ofp = ofp_from_ofilter(fg->outputs[i]);
if (fgt.eof_out[i] || !fgt.graph)
continue;
ret = fg_output_frame(ofp, &fgt, NULL);
if (ret < 0)
goto finish;
}
finish:
// EOF is normal termination
if (ret == AVERROR_EOF)
ret = 0;
fg_thread_uninit(&fgt);
return ret;
}
void fg_send_command(FilterGraph *fg, double time, const char *target,
const char *command, const char *arg, int all_filters)
{
FilterGraphPriv *fgp = fgp_from_fg(fg);
AVBufferRef *buf;
FilterCommand *fc;
fc = av_mallocz(sizeof(*fc));
if (!fc)
return;
buf = av_buffer_create((uint8_t*)fc, sizeof(*fc), filter_command_free, NULL, 0);
if (!buf) {
av_freep(&fc);
return;
}
fc->target = av_strdup(target);
fc->command = av_strdup(command);
fc->arg = av_strdup(arg);
if (!fc->target || !fc->command || !fc->arg) {
av_buffer_unref(&buf);
return;
}
fc->time = time;
fc->all_filters = all_filters;
fgp->frame->buf[0] = buf;
fgp->frame->opaque = (void*)(intptr_t)FRAME_OPAQUE_SEND_COMMAND;
sch_filter_command(fgp->sch, fgp->sch_idx, fgp->frame);
}
Reference in New Issue View Git Blame Copy Permalink