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FFmpeg/fftools/ffmpeg_filter.c
Anton Khirnov 57a42a714b fftools/ffmpeg_filter: consolidate calling avfilter_graph_set_auto_convert() 
Do not call it from choose_pix_fmts(), as that function is not supposed
to modify random filtergraph properties.
2023-07-11 19:28:18 +02:00

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/*
* 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/display.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "libavutil/imgutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/timestamp.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;
int disable_conversions;
const char *graph_desc;
// frame for temporarily holding output from the filtergraph
AVFrame *frame;
} FilterGraphPriv;
static FilterGraphPriv *fgp_from_fg(FilterGraph *fg)
{
return (FilterGraphPriv*)fg;
}
static const FilterGraphPriv *cfgp_from_cfg(const FilterGraph *fg)
{
return (const FilterGraphPriv*)fg;
}
typedef struct InputFilterPriv {
InputFilter ifilter;
AVFilterContext *filter;
InputStream *ist;
// 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;
// parameters configured for this input
int format;
int width, height;
AVRational sample_aspect_ratio;
int sample_rate;
AVChannelLayout ch_layout;
AVRational time_base;
AVFifo *frame_queue;
AVBufferRef *hw_frames_ctx;
int displaymatrix_present;
int32_t displaymatrix[9];
// fallback parameters to use when no input is ever sent
struct {
int format;
int width;
int height;
AVRational sample_aspect_ratio;
int sample_rate;
AVChannelLayout ch_layout;
} fallback;
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 OutputFilterPriv {
OutputFilter ofilter;
/* desired output stream properties */
int format;
int width, height;
int sample_rate;
AVChannelLayout ch_layout;
// 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;
} OutputFilterPriv;
static OutputFilterPriv *ofp_from_ofilter(OutputFilter *ofilter)
{
return (OutputFilterPriv*)ofilter;
}
static int configure_filtergraph(FilterGraph *fg);
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;
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, i;
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 (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;
}
// FIXME: YUV420P etc. are actually supported with full color range,
// yet the latter information isn't available here.
static const enum AVPixelFormat *get_compliance_normal_pix_fmts(const AVCodec *codec, const enum AVPixelFormat default_formats[])
{
static const enum AVPixelFormat mjpeg_formats[] =
{ AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ444P,
AV_PIX_FMT_NONE };
if (!strcmp(codec->name, "mjpeg")) {
return mjpeg_formats;
} else {
return default_formats;
}
}
static enum AVPixelFormat
choose_pixel_fmt(const AVCodec *codec, enum AVPixelFormat target,
int strict_std_compliance)
{
if (codec && codec->pix_fmts) {
const enum AVPixelFormat *p = codec->pix_fmts;
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(target);
//FIXME: This should check for AV_PIX_FMT_FLAG_ALPHA after PAL8 pixel format without alpha is implemented
int has_alpha = desc ? desc->nb_components % 2 == 0 : 0;
enum AVPixelFormat best= AV_PIX_FMT_NONE;
if (strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
p = get_compliance_normal_pix_fmts(codec, p);
}
for (; *p != AV_PIX_FMT_NONE; p++) {
best = av_find_best_pix_fmt_of_2(best, *p, target, has_alpha, NULL);
if (*p == target)
break;
}
if (*p == AV_PIX_FMT_NONE) {
if (target != AV_PIX_FMT_NONE)
av_log(NULL, AV_LOG_WARNING,
"Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
av_get_pix_fmt_name(target),
codec->name,
av_get_pix_fmt_name(best));
return best;
}
}
return target;
}
/* May return 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 const char *choose_pix_fmts(OutputFilter *ofilter, AVBPrint *bprint)
{
OutputStream *ost = ofilter->ost;
AVCodecContext *enc = ost->enc_ctx;
const AVDictionaryEntry *strict_dict = av_dict_get(ost->encoder_opts, "strict", NULL, 0);
if (strict_dict)
// used by choose_pixel_fmt() and below
av_opt_set(ost->enc_ctx, "strict", strict_dict->value, 0);
if (ost->keep_pix_fmt) {
if (ost->enc_ctx->pix_fmt == AV_PIX_FMT_NONE)
return NULL;
return av_get_pix_fmt_name(ost->enc_ctx->pix_fmt);
}
if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
return av_get_pix_fmt_name(choose_pixel_fmt(enc->codec, enc->pix_fmt,
ost->enc_ctx->strict_std_compliance));
} else if (enc->codec->pix_fmts) {
const enum AVPixelFormat *p;
p = enc->codec->pix_fmts;
if (ost->enc_ctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
p = get_compliance_normal_pix_fmts(enc->codec, p);
}
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))
report_and_exit(AVERROR(ENOMEM));
return bprint->str;
} else
return NULL;
}
/* 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)
{
int i;
for (i = 0; i < fg->nb_inputs; i++) {
InputFilterPriv *ifp = ifp_from_ifilter(fg->inputs[i]);
if (ifp->format < 0)
return 0;
}
return 1;
}
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;
char *res;
if (nb_pads > 1)
res = av_strdup(ctx->filter->name);
else
res = av_asprintf("%s:%s", ctx->filter->name,
avfilter_pad_get_name(pads, inout->pad_idx));
if (!res)
report_and_exit(AVERROR(ENOMEM));
return res;
}
static OutputFilter *ofilter_alloc(FilterGraph *fg)
{
OutputFilterPriv *ofp;
OutputFilter *ofilter;
ofp = allocate_array_elem(&fg->outputs, sizeof(*ofp),
&fg->nb_outputs);
ofilter = &ofp->ofilter;
ofilter->graph = fg;
ofp->format = -1;
ofilter->last_pts = AV_NOPTS_VALUE;
return ofilter;
}
static int ifilter_bind_ist(InputFilter *ifilter, InputStream *ist)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
int ret;
av_assert0(!ifp->ist);
ifp->ist = ist;
ifp->type_src = ist->st->codecpar->codec_type;
ret = ist_filter_add(ist, ifilter, filtergraph_is_simple(ifilter->graph));
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);
}
return 0;
}
static void set_channel_layout(OutputFilterPriv *f, OutputStream *ost)
{
const AVCodec *c = ost->enc_ctx->codec;
int i, err;
if (ost->enc_ctx->ch_layout.order != AV_CHANNEL_ORDER_UNSPEC) {
/* Pass the layout through for all orders but UNSPEC */
err = av_channel_layout_copy(&f->ch_layout, &ost->enc_ctx->ch_layout);
if (err < 0)
report_and_exit(AVERROR(ENOMEM));
return;
}
/* Requested layout is of order UNSPEC */
if (!c->ch_layouts) {
/* 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, ost->enc_ctx->ch_layout.nb_channels);
return;
}
/* 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; c->ch_layouts[i].nb_channels; i++) {
if (c->ch_layouts[i].nb_channels == ost->enc_ctx->ch_layout.nb_channels)
break;
}
if (c->ch_layouts[i].nb_channels) {
/* Use it if one is found */
err = av_channel_layout_copy(&f->ch_layout, &c->ch_layouts[i]);
if (err < 0)
report_and_exit(AVERROR(ENOMEM));
return;
}
/* 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, ost->enc_ctx->ch_layout.nb_channels);
}
void ofilter_bind_ost(OutputFilter *ofilter, OutputStream *ost)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
FilterGraph *fg = ofilter->graph;
FilterGraphPriv *fgp = fgp_from_fg(fg);
const AVCodec *c = ost->enc_ctx->codec;
av_assert0(!ofilter->ost);
ofilter->ost = ost;
av_freep(&ofilter->linklabel);
switch (ost->enc_ctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
ofp->width = ost->enc_ctx->width;
ofp->height = ost->enc_ctx->height;
if (ost->enc_ctx->pix_fmt != AV_PIX_FMT_NONE) {
ofp->format = ost->enc_ctx->pix_fmt;
} else {
ofp->formats = c->pix_fmts;
}
fgp->disable_conversions |= ost->keep_pix_fmt;
break;
case AVMEDIA_TYPE_AUDIO:
if (ost->enc_ctx->sample_fmt != AV_SAMPLE_FMT_NONE) {
ofp->format = ost->enc_ctx->sample_fmt;
} else {
ofp->formats = c->sample_fmts;
}
if (ost->enc_ctx->sample_rate) {
ofp->sample_rate = ost->enc_ctx->sample_rate;
} else {
ofp->sample_rates = c->supported_samplerates;
}
if (ost->enc_ctx->ch_layout.nb_channels) {
set_channel_layout(ofp, ost);
} else if (c->ch_layouts) {
ofp->ch_layouts = c->ch_layouts;
}
break;
}
// if we have all input parameters and all outputs are bound,
// the graph can now be configured
if (ifilter_has_all_input_formats(fg)) {
int ret;
for (int i = 0; i < fg->nb_outputs; i++)
if (!fg->outputs[i]->ost)
return;
ret = configure_filtergraph(fg);
if (ret < 0) {
av_log(fg, AV_LOG_ERROR, "Error configuring filter graph: %s\n",
av_err2str(ret));
exit_program(1);
}
}
}
static InputFilter *ifilter_alloc(FilterGraph *fg)
{
InputFilterPriv *ifp = allocate_array_elem(&fg->inputs, sizeof(*ifp),
&fg->nb_inputs);
InputFilter *ifilter = &ifp->ifilter;
ifilter->graph = fg;
ifp->frame = av_frame_alloc();
if (!ifp->frame)
report_and_exit(AVERROR(ENOMEM));
ifp->format = -1;
ifp->fallback.format = -1;
ifp->frame_queue = av_fifo_alloc2(8, sizeof(AVFrame*), AV_FIFO_FLAG_AUTO_GROW);
if (!ifp->frame_queue)
report_and_exit(AVERROR(ENOMEM));
return ifilter;
}
void fg_free(FilterGraph **pfg)
{
FilterGraph *fg = *pfg;
FilterGraphPriv *fgp;
if (!fg)
return;
fgp = fgp_from_fg(fg);
avfilter_graph_free(&fg->graph);
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_channel_layout_uninit(&ifp->fallback.ch_layout);
av_frame_free(&ifp->frame);
av_buffer_unref(&ifp->hw_frames_ctx);
av_freep(&ifp->linklabel);
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_freep(&ofilter->linklabel);
av_freep(&ofilter->name);
av_channel_layout_uninit(&ofp->ch_layout);
av_freep(&fg->outputs[j]);
}
av_freep(&fg->outputs);
av_freep(&fgp->graph_desc);
av_frame_free(&fgp->frame);
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,
};
FilterGraph *fg_create(char *graph_desc)
{
FilterGraphPriv *fgp = allocate_array_elem(&filtergraphs, sizeof(*fgp), &nb_filtergraphs);
FilterGraph *fg = &fgp->fg;
AVFilterInOut *inputs, *outputs;
AVFilterGraph *graph;
int ret = 0;
fg->class = &fg_class;
fg->index = nb_filtergraphs - 1;
fgp->graph_desc = graph_desc;
fgp->disable_conversions = !auto_conversion_filters;
snprintf(fgp->log_name, sizeof(fgp->log_name), "fc#%d", fg->index);
fgp->frame = av_frame_alloc();
if (!fgp->frame)
report_and_exit(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)
report_and_exit(AVERROR(ENOMEM));
graph->nb_threads = 1;
ret = graph_parse(graph, fgp->graph_desc, &inputs, &outputs, NULL);
if (ret < 0)
goto fail;
for (AVFilterInOut *cur = inputs; cur; cur = cur->next) {
InputFilter *const ifilter = ifilter_alloc(fg);
InputFilterPriv *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);
ifilter->name = describe_filter_link(fg, cur, 1);
}
for (AVFilterInOut *cur = outputs; cur; cur = cur->next) {
OutputFilter *const ofilter = ofilter_alloc(fg);
ofilter->linklabel = cur->name;
cur->name = NULL;
ofilter->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
cur->pad_idx);
ofilter->name = describe_filter_link(fg, cur, 0);
}
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;
}
fail:
avfilter_inout_free(&inputs);
avfilter_inout_free(&outputs);
avfilter_graph_free(&graph);
if (ret < 0)
report_and_exit(ret);
return fg;
}
int init_simple_filtergraph(InputStream *ist, OutputStream *ost,
char *graph_desc)
{
FilterGraph *fg;
FilterGraphPriv *fgp;
int ret;
fg = fg_create(graph_desc);
if (!fg)
report_and_exit(AVERROR(ENOMEM));
fgp = fgp_from_fg(fg);
fgp->is_simple = 1;
snprintf(fgp->log_name, sizeof(fgp->log_name), "%cf#%d:%d",
av_get_media_type_string(ost->type)[0],
ost->file_index, ost->index);
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);
}
ost->filter = fg->outputs[0];
ret = ifilter_bind_ist(fg->inputs[0], ist);
if (ret < 0)
return ret;
ofilter_bind_ost(fg->outputs[0], ost);
return 0;
}
static void init_input_filter(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;
// TODO: support other filter types
if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
av_log(fg, AV_LOG_FATAL, "Only video and audio filters supported "
"currently.\n");
exit_program(1);
}
if (ifp->linklabel) {
AVFormatContext *s;
AVStream *st = NULL;
char *p;
int 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);
exit_program(1);
}
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);
exit_program(1);
}
ist = input_files[file_idx]->streams[st->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);
exit_program(1);
}
}
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);
exit_program(1);
}
}
int init_complex_filtergraph(FilterGraph *fg)
{
// bind filtergraph inputs to input streams
for (int i = 0; i < fg->nb_inputs; i++)
init_input_filter(fg, fg->inputs[i]);
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, OutputFilter *ofilter, AVFilterInOut *out)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
OutputStream *ost = ofilter->ost;
OutputFile *of = output_files[ost->file_index];
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_%d_%d", ost->file_index, ost->index);
ret = avfilter_graph_create_filter(&ofilter->filter,
avfilter_get_by_name("buffersink"),
name, NULL, NULL, fg->graph);
if (ret < 0)
return ret;
if ((ofp->width || ofp->height) && ofilter->ost->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(ost->sws_dict, e))) {
av_strlcatf(args, sizeof(args), ":%s=%s", e->key, e->value);
}
snprintf(name, sizeof(name), "scaler_out_%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;
}
av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
if ((pix_fmts = choose_pix_fmts(ofilter, &bprint))) {
AVFilterContext *filter;
ret = avfilter_graph_create_filter(&filter,
avfilter_get_by_name("format"),
"format", pix_fmts, NULL, fg->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_%d_%d",
ost->file_index, ost->index);
ret = insert_trim(of->start_time, of->recording_time,
&last_filter, &pad_idx, name);
if (ret < 0)
return ret;
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)
{
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
OutputStream *ost = ofilter->ost;
OutputFile *of = output_files[ost->file_index];
AVFilterContext *last_filter = out->filter_ctx;
int pad_idx = out->pad_idx;
AVBPrint args;
char name[255];
int ret;
snprintf(name, sizeof(name), "out_%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 ((ret = av_opt_set_int(ofilter->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(fg, 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, fg->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);
#if FFMPEG_OPT_MAP_CHANNEL
if (ost->audio_channels_mapped) {
AVChannelLayout mapped_layout = { 0 };
int i;
av_channel_layout_default(&mapped_layout, ost->audio_channels_mapped);
av_channel_layout_describe_bprint(&mapped_layout, &args);
for (i = 0; i < ost->audio_channels_mapped; i++)
if (ost->audio_channels_map[i] != -1)
av_bprintf(&args, "|c%d=c%d", i, ost->audio_channels_map[i]);
AUTO_INSERT_FILTER("-map_channel", "pan", args.str);
av_bprint_clear(&args);
}
#endif
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_%d_%d",
ost->file_index, ost->index);
ret = avfilter_graph_create_filter(&format,
avfilter_get_by_name("aformat"),
name, args.str, NULL, fg->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 (ost->apad && of->shortest) {
int i;
for (i = 0; i < of->nb_streams; i++)
if (of->streams[i]->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
break;
if (i < of->nb_streams) {
AUTO_INSERT_FILTER("-apad", "apad", ost->apad);
}
}
snprintf(name, sizeof(name), "trim for output stream %d:%d",
ost->file_index, ost->index);
ret = insert_trim(of->start_time, of->recording_time,
&last_filter, &pad_idx, name);
if (ret < 0)
goto fail;
if ((ret = avfilter_link(last_filter, pad_idx, ofilter->filter, 0)) < 0)
goto fail;
fail:
av_bprint_finalize(&args, NULL);
return ret;
}
static int configure_output_filter(FilterGraph *fg, OutputFilter *ofilter,
AVFilterInOut *out)
{
if (!ofilter->ost) {
av_log(fg, AV_LOG_FATAL, "Filter %s has an unconnected output\n", ofilter->name);
exit_program(1);
}
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); return 0;
}
}
void check_filter_outputs(void)
{
int i;
for (i = 0; i < nb_filtergraphs; i++) {
int n;
for (n = 0; n < filtergraphs[i]->nb_outputs; n++) {
OutputFilter *output = filtergraphs[i]->outputs[n];
if (!output->ost) {
av_log(filtergraphs[i], AV_LOG_FATAL,
"Filter %s has an unconnected output\n", output->name);
exit_program(1);
}
}
}
}
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, 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;
InputStream *ist = ifp->ist;
InputFile *f = input_files[ist->file_index];
AVRational fr = ist->framerate;
AVRational sar;
AVBPrint args;
char name[255];
int ret, pad_idx = 0;
int64_t tsoffset = 0;
AVBufferSrcParameters *par = av_buffersrc_parameters_alloc();
if (!par)
return AVERROR(ENOMEM);
memset(par, 0, sizeof(*par));
par->format = AV_PIX_FMT_NONE;
if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_AUDIO) {
av_log(fg, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
ret = AVERROR(EINVAL);
goto fail;
}
if (!fr.num)
fr = ist->framerate_guessed;
if (ifp->type_src == AVMEDIA_TYPE_SUBTITLE)
sub2video_prepare(ifp);
ifp->time_base = ist->framerate.num ? av_inv_q(ist->framerate) :
ist->st->time_base;
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",
ifp->width, ifp->height, ifp->format,
ifp->time_base.num, ifp->time_base.den, sar.num, sar.den);
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 %d:%d", fg->index,
ist->file_index, ist->index);
if ((ret = avfilter_graph_create_filter(&ifp->filter, buffer_filt, name,
args.str, NULL, fg->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
if (ist->autorotate && !(desc->flags & AV_PIX_FMT_FLAG_HWACCEL)) {
int32_t *displaymatrix = ifp->displaymatrix;
double theta;
if (!ifp->displaymatrix_present)
displaymatrix = (int32_t *)av_stream_get_side_data(ist->st, AV_PKT_DATA_DISPLAYMATRIX, NULL);
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;
}
snprintf(name, sizeof(name), "trim_in_%d_%d",
ist->file_index, ist->index);
if (copy_ts) {
tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
tsoffset += f->ctx->start_time;
}
ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
AV_NOPTS_VALUE : tsoffset, f->recording_time,
&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, InputFilter *ifilter,
AVFilterInOut *in)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
AVFilterContext *last_filter;
const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
InputStream *ist = ifp->ist;
InputFile *f = input_files[ist->file_index];
AVBPrint args;
char name[255];
int ret, pad_idx = 0;
int64_t tsoffset = 0;
if (ist->dec_ctx->codec_type != AVMEDIA_TYPE_AUDIO) {
av_log(fg, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
return AVERROR(EINVAL);
}
ifp->time_base = (AVRational){ 1, ifp->sample_rate };
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_%d_%d", fg->index,
ist->file_index, ist->index);
if ((ret = avfilter_graph_create_filter(&ifp->filter, abuffer_filt,
name, args.str, NULL,
fg->graph)) < 0)
return ret;
last_filter = ifp->filter;
snprintf(name, sizeof(name), "trim for input stream %d:%d",
ist->file_index, ist->index);
if (copy_ts) {
tsoffset = f->start_time == AV_NOPTS_VALUE ? 0 : f->start_time;
if (!start_at_zero && f->ctx->start_time != AV_NOPTS_VALUE)
tsoffset += f->ctx->start_time;
}
ret = insert_trim(((f->start_time == AV_NOPTS_VALUE) || !f->accurate_seek) ?
AV_NOPTS_VALUE : tsoffset, f->recording_time,
&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, InputFilter *ifilter,
AVFilterInOut *in)
{
switch (ifp_from_ifilter(ifilter)->type) {
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); return 0;
}
}
static void cleanup_filtergraph(FilterGraph *fg)
{
int i;
for (i = 0; i < fg->nb_outputs; i++)
fg->outputs[i]->filter = (AVFilterContext *)NULL;
for (i = 0; i < fg->nb_inputs; i++)
ifp_from_ifilter(fg->inputs[i])->filter = NULL;
avfilter_graph_free(&fg->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 configure_filtergraph(FilterGraph *fg)
{
FilterGraphPriv *fgp = fgp_from_fg(fg);
AVBufferRef *hw_device;
AVFilterInOut *inputs, *outputs, *cur;
int ret, i, simple = filtergraph_is_simple(fg);
const char *graph_desc = fgp->graph_desc;
cleanup_filtergraph(fg);
if (!(fg->graph = avfilter_graph_alloc()))
return AVERROR(ENOMEM);
if (simple) {
OutputStream *ost = fg->outputs[0]->ost;
if (filter_nbthreads) {
ret = av_opt_set(fg->graph, "threads", filter_nbthreads, 0);
if (ret < 0)
goto fail;
} else {
const AVDictionaryEntry *e = NULL;
e = av_dict_get(ost->encoder_opts, "threads", NULL, 0);
if (e)
av_opt_set(fg->graph, "threads", e->value, 0);
}
if (av_dict_count(ost->sws_dict)) {
ret = av_dict_get_string(ost->sws_dict,
&fg->graph->scale_sws_opts,
'=', ':');
if (ret < 0)
goto fail;
}
if (av_dict_count(ost->swr_opts)) {
char *args;
ret = av_dict_get_string(ost->swr_opts, &args, '=', ':');
if (ret < 0)
goto fail;
av_opt_set(fg->graph, "aresample_swr_opts", args, 0);
av_free(args);
}
} else {
fg->graph->nb_threads = filter_complex_nbthreads;
}
hw_device = hw_device_for_filter();
if ((ret = graph_parse(fg->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, 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++)
configure_output_filter(fg, fg->outputs[i], cur);
avfilter_inout_free(&outputs);
if (fgp->disable_conversions)
avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
goto fail;
fgp->is_meta = graph_is_meta(fg->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 (i = 0; i < fg->nb_outputs; i++) {
OutputFilter *ofilter = fg->outputs[i];
OutputFilterPriv *ofp = ofp_from_ofilter(ofilter);
AVFilterContext *sink = ofilter->filter;
ofp->format = av_buffersink_get_format(sink);
ofp->width = av_buffersink_get_w(sink);
ofp->height = av_buffersink_get_h(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 (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_update(ifp, INT64_MIN, (const AVSubtitle*)tmp->buf[0]->data);
} 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 (i = 0; i < fg->nb_inputs; i++) {
InputFilterPriv *ifp = ifp_from_ifilter(fg->inputs[i]);
if (ifp->eof) {
ret = av_buffersrc_add_frame(ifp->filter, NULL);
if (ret < 0)
goto fail;
}
}
return 0;
fail:
cleanup_filtergraph(fg);
return ret;
}
int ifilter_parameters_from_dec(InputFilter *ifilter, const AVCodecContext *dec)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
if (dec->codec_type == AVMEDIA_TYPE_VIDEO) {
ifp->fallback.format = dec->pix_fmt;
ifp->fallback.width = dec->width;
ifp->fallback.height = dec->height;
ifp->fallback.sample_aspect_ratio = dec->sample_aspect_ratio;
} else if (dec->codec_type == AVMEDIA_TYPE_AUDIO) {
int ret;
ifp->fallback.format = dec->sample_fmt;
ifp->fallback.sample_rate = dec->sample_rate;
ret = av_channel_layout_copy(&ifp->fallback.ch_layout, &dec->ch_layout);
if (ret < 0)
return ret;
} else {
// for subtitles (i.e. sub2video) we set the actual parameters,
// rather than just fallback
ifp->width = ifp->ist->sub2video.w;
ifp->height = ifp->ist->sub2video.h;
/* 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;
av_log(NULL, AV_LOG_VERBOSE, "sub2video: using %dx%d canvas\n", ifp->width, ifp->height);
}
return 0;
}
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->format = frame->format;
ifp->width = frame->width;
ifp->height = frame->height;
ifp->sample_aspect_ratio = frame->sample_aspect_ratio;
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;
}
int reap_filters(int flush)
{
/* Reap all buffers present in the buffer sinks */
for (OutputStream *ost = ost_iter(NULL); ost; ost = ost_iter(ost)) {
FilterGraphPriv *fgp;
AVFrame *filtered_frame;
AVFilterContext *filter;
int ret = 0;
if (!ost->filter || !ost->filter->graph->graph)
continue;
filter = ost->filter->filter;
fgp = fgp_from_fg(ost->filter->graph);
filtered_frame = fgp->frame;
while (1) {
FrameData *fd;
ret = av_buffersink_get_frame_flags(filter, filtered_frame,
AV_BUFFERSINK_FLAG_NO_REQUEST);
if (ret < 0) {
if (ret != AVERROR(EAGAIN) && ret != AVERROR_EOF) {
av_log(fgp, AV_LOG_WARNING,
"Error in av_buffersink_get_frame_flags(): %s\n", av_err2str(ret));
} else if (flush && ret == AVERROR_EOF) {
if (av_buffersink_get_type(filter) == AVMEDIA_TYPE_VIDEO)
enc_frame(ost, NULL);
}
break;
}
if (ost->finished) {
av_frame_unref(filtered_frame);
continue;
}
if (filtered_frame->pts != AV_NOPTS_VALUE) {
AVRational tb = av_buffersink_get_time_base(filter);
ost->filter->last_pts = av_rescale_q(filtered_frame->pts, tb,
AV_TIME_BASE_Q);
filtered_frame->time_base = tb;
if (debug_ts)
av_log(fgp, AV_LOG_INFO, "filter_raw -> pts:%s pts_time:%s time_base:%d/%d\n",
av_ts2str(filtered_frame->pts),
av_ts2timestr(filtered_frame->pts, &tb),
tb.num, tb.den);
}
fd = frame_data(filtered_frame);
if (!fd) {
av_frame_unref(filtered_frame);
report_and_exit(AVERROR(ENOMEM));
}
// 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 (ost->type == AVMEDIA_TYPE_VIDEO)
fd->frame_rate_filter = av_buffersink_get_frame_rate(filter);
enc_frame(ost, filtered_frame);
av_frame_unref(filtered_frame);
}
}
return 0;
}
void ifilter_sub2video_heartbeat(InputFilter *ifilter, int64_t pts, AVRational tb)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
int64_t pts2;
if (!ifilter->graph->graph)
return;
/* 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);
if (av_buffersrc_get_nb_failed_requests(ifp->filter))
sub2video_push_ref(ifp, pts2);
}
int ifilter_sub2video(InputFilter *ifilter, const AVFrame *frame)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
int ret;
if (ifilter->graph->graph) {
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);
} else if (frame) {
AVFrame *tmp = av_frame_clone(frame);
if (!tmp)
return AVERROR(ENOMEM);
ret = av_fifo_write(ifp->frame_queue, &tmp, 1);
if (ret < 0) {
av_frame_free(&tmp);
return ret;
}
}
return 0;
}
int ifilter_send_eof(InputFilter *ifilter, int64_t pts, AVRational tb)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
int ret;
ifp->eof = 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->fallback.format;
ifp->sample_rate = ifp->fallback.sample_rate;
ifp->width = ifp->fallback.width;
ifp->height = ifp->fallback.height;
ifp->sample_aspect_ratio = ifp->fallback.sample_aspect_ratio;
ret = av_channel_layout_copy(&ifp->ch_layout,
&ifp->fallback.ch_layout);
if (ret < 0)
return ret;
if (ifilter_has_all_input_formats(ifilter->graph)) {
ret = configure_filtergraph(ifilter->graph);
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 stream %d:%d after EOF\n",
ifp->ist->file_index, ifp->ist->index);
return AVERROR_INVALIDDATA;
}
}
return 0;
}
int ifilter_send_frame(InputFilter *ifilter, AVFrame *frame, int keep_reference)
{
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
FilterGraph *fg = ifilter->graph;
AVFrameSideData *sd;
int need_reinit, ret;
/* determine if the parameters for this input changed */
need_reinit = ifp->format != frame->format;
switch (ifp->type) {
case AVMEDIA_TYPE_AUDIO:
need_reinit |= ifp->sample_rate != frame->sample_rate ||
av_channel_layout_compare(&ifp->ch_layout, &frame->ch_layout);
break;
case AVMEDIA_TYPE_VIDEO:
need_reinit |= ifp->width != frame->width ||
ifp->height != frame->height;
break;
}
if (!ifp->ist->reinit_filters && fg->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 = 1;
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 = 1;
} else if (ifp->displaymatrix_present)
need_reinit = 1;
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 || !fg->graph) {
if (!ifilter_has_all_input_formats(fg)) {
AVFrame *tmp = av_frame_clone(frame);
if (!tmp)
return AVERROR(ENOMEM);
ret = av_fifo_write(ifp->frame_queue, &tmp, 1);
if (ret < 0)
av_frame_free(&tmp);
return ret;
}
ret = reap_filters(0);
if (ret < 0 && ret != AVERROR_EOF) {
av_log(fg, AV_LOG_ERROR, "Error while filtering: %s\n", av_err2str(ret));
return ret;
}
ret = configure_filtergraph(fg);
if (ret < 0) {
av_log(fg, AV_LOG_ERROR, "Error reinitializing filters!\n");
return ret;
}
}
if (keep_reference) {
ret = av_frame_ref(ifp->frame, frame);
if (ret < 0)
return ret;
} else
av_frame_move_ref(ifp->frame, frame);
frame = ifp->frame;
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 LIBAVUTIL_VERSION_MAJOR < 59
AV_NOWARN_DEPRECATED(
frame->pkt_duration = frame->duration;
)
#endif
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;
}
int fg_transcode_step(FilterGraph *graph, InputStream **best_ist)
{
int i, ret;
int nb_requests, nb_requests_max = 0;
InputStream *ist;
if (!graph->graph) {
for (int i = 0; i < graph->nb_inputs; i++) {
InputFilter *ifilter = graph->inputs[i];
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
if (ifp->format < 0 && !ifp->eof) {
*best_ist = ifp->ist;
return 0;
}
}
// graph not configured, but all inputs are either initialized or EOF
for (int i = 0; i < graph->nb_outputs; i++)
graph->outputs[i]->ost->inputs_done = 1;
return 0;
}
*best_ist = NULL;
ret = avfilter_graph_request_oldest(graph->graph);
if (ret >= 0)
return reap_filters(0);
if (ret == AVERROR_EOF) {
ret = reap_filters(1);
for (i = 0; i < graph->nb_outputs; i++)
close_output_stream(graph->outputs[i]->ost);
return ret;
}
if (ret != AVERROR(EAGAIN))
return ret;
for (i = 0; i < graph->nb_inputs; i++) {
InputFilter *ifilter = graph->inputs[i];
InputFilterPriv *ifp = ifp_from_ifilter(ifilter);
ist = ifp->ist;
if (input_files[ist->file_index]->eagain || ifp->eof)
continue;
nb_requests = av_buffersrc_get_nb_failed_requests(ifp->filter);
if (nb_requests > nb_requests_max) {
nb_requests_max = nb_requests;
*best_ist = ist;
}
}
if (!*best_ist)
for (i = 0; i < graph->nb_outputs; i++)
graph->outputs[i]->ost->unavailable = 1;
return 0;
}
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