mirror of https://github.com/FFmpeg/FFmpeg.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1074 lines
38 KiB
1074 lines
38 KiB
/* |
|
* filter graphs |
|
* Copyright (c) 2008 Vitor Sessak |
|
* Copyright (c) 2007 Bobby Bingham |
|
* |
|
* 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 <ctype.h> |
|
#include <string.h> |
|
|
|
#include "libavutil/avassert.h" |
|
#include "libavutil/channel_layout.h" |
|
#include "libavutil/opt.h" |
|
#include "libavutil/pixdesc.h" |
|
#include "libavcodec/avcodec.h" // avcodec_find_best_pix_fmt_of_2() |
|
#include "avfilter.h" |
|
#include "avfiltergraph.h" |
|
#include "formats.h" |
|
#include "internal.h" |
|
|
|
#define OFFSET(x) offsetof(AVFilterGraph,x) |
|
|
|
static const AVOption options[]={ |
|
{"scale_sws_opts" , "default scale filter options" , OFFSET(scale_sws_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, |
|
{"aresample_swr_opts" , "default aresample filter options" , OFFSET(aresample_swr_opts) , AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, 0 }, |
|
{0} |
|
}; |
|
|
|
|
|
static const AVClass filtergraph_class = { |
|
.class_name = "AVFilterGraph", |
|
.item_name = av_default_item_name, |
|
.option = options, |
|
.version = LIBAVUTIL_VERSION_INT, |
|
.category = AV_CLASS_CATEGORY_FILTER, |
|
}; |
|
|
|
AVFilterGraph *avfilter_graph_alloc(void) |
|
{ |
|
AVFilterGraph *ret = av_mallocz(sizeof(AVFilterGraph)); |
|
if (!ret) |
|
return NULL; |
|
ret->av_class = &filtergraph_class; |
|
return ret; |
|
} |
|
|
|
void avfilter_graph_free(AVFilterGraph **graph) |
|
{ |
|
if (!*graph) |
|
return; |
|
for (; (*graph)->filter_count > 0; (*graph)->filter_count--) |
|
avfilter_free((*graph)->filters[(*graph)->filter_count - 1]); |
|
av_freep(&(*graph)->sink_links); |
|
av_freep(&(*graph)->scale_sws_opts); |
|
av_freep(&(*graph)->aresample_swr_opts); |
|
av_freep(&(*graph)->resample_lavr_opts); |
|
av_freep(&(*graph)->filters); |
|
av_freep(graph); |
|
} |
|
|
|
int avfilter_graph_add_filter(AVFilterGraph *graph, AVFilterContext *filter) |
|
{ |
|
AVFilterContext **filters = av_realloc(graph->filters, |
|
sizeof(AVFilterContext*) * (graph->filter_count+1)); |
|
if (!filters) |
|
return AVERROR(ENOMEM); |
|
|
|
graph->filters = filters; |
|
graph->filters[graph->filter_count++] = filter; |
|
|
|
return 0; |
|
} |
|
|
|
int avfilter_graph_create_filter(AVFilterContext **filt_ctx, AVFilter *filt, |
|
const char *name, const char *args, void *opaque, |
|
AVFilterGraph *graph_ctx) |
|
{ |
|
int ret; |
|
|
|
if ((ret = avfilter_open(filt_ctx, filt, name)) < 0) |
|
goto fail; |
|
if ((ret = avfilter_init_filter(*filt_ctx, args, opaque)) < 0) |
|
goto fail; |
|
if ((ret = avfilter_graph_add_filter(graph_ctx, *filt_ctx)) < 0) |
|
goto fail; |
|
return 0; |
|
|
|
fail: |
|
if (*filt_ctx) |
|
avfilter_free(*filt_ctx); |
|
*filt_ctx = NULL; |
|
return ret; |
|
} |
|
|
|
void avfilter_graph_set_auto_convert(AVFilterGraph *graph, unsigned flags) |
|
{ |
|
graph->disable_auto_convert = flags; |
|
} |
|
|
|
/** |
|
* Check for the validity of graph. |
|
* |
|
* A graph is considered valid if all its input and output pads are |
|
* connected. |
|
* |
|
* @return 0 in case of success, a negative value otherwise |
|
*/ |
|
static int graph_check_validity(AVFilterGraph *graph, AVClass *log_ctx) |
|
{ |
|
AVFilterContext *filt; |
|
int i, j; |
|
|
|
for (i = 0; i < graph->filter_count; i++) { |
|
const AVFilterPad *pad; |
|
filt = graph->filters[i]; |
|
|
|
for (j = 0; j < filt->nb_inputs; j++) { |
|
if (!filt->inputs[j] || !filt->inputs[j]->src) { |
|
pad = &filt->input_pads[j]; |
|
av_log(log_ctx, AV_LOG_ERROR, |
|
"Input pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any source\n", |
|
pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name); |
|
return AVERROR(EINVAL); |
|
} |
|
} |
|
|
|
for (j = 0; j < filt->nb_outputs; j++) { |
|
if (!filt->outputs[j] || !filt->outputs[j]->dst) { |
|
pad = &filt->output_pads[j]; |
|
av_log(log_ctx, AV_LOG_ERROR, |
|
"Output pad \"%s\" with type %s of the filter instance \"%s\" of %s not connected to any destination\n", |
|
pad->name, av_get_media_type_string(pad->type), filt->name, filt->filter->name); |
|
return AVERROR(EINVAL); |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* Configure all the links of graphctx. |
|
* |
|
* @return 0 in case of success, a negative value otherwise |
|
*/ |
|
static int graph_config_links(AVFilterGraph *graph, AVClass *log_ctx) |
|
{ |
|
AVFilterContext *filt; |
|
int i, ret; |
|
|
|
for (i=0; i < graph->filter_count; i++) { |
|
filt = graph->filters[i]; |
|
|
|
if (!filt->nb_outputs) { |
|
if ((ret = avfilter_config_links(filt))) |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
AVFilterContext *avfilter_graph_get_filter(AVFilterGraph *graph, char *name) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < graph->filter_count; i++) |
|
if (graph->filters[i]->name && !strcmp(name, graph->filters[i]->name)) |
|
return graph->filters[i]; |
|
|
|
return NULL; |
|
} |
|
|
|
static void sanitize_channel_layouts(void *log, AVFilterChannelLayouts *l) |
|
{ |
|
if (!l) |
|
return; |
|
if (l->nb_channel_layouts) { |
|
if (l->all_layouts || l->all_counts) |
|
av_log(log, AV_LOG_WARNING, "All layouts set on non-empty list\n"); |
|
l->all_layouts = l->all_counts = 0; |
|
} else { |
|
if (l->all_counts && !l->all_layouts) |
|
av_log(log, AV_LOG_WARNING, "All counts without all layouts\n"); |
|
l->all_layouts = 1; |
|
} |
|
} |
|
|
|
static int filter_query_formats(AVFilterContext *ctx) |
|
{ |
|
int ret, i; |
|
AVFilterFormats *formats; |
|
AVFilterChannelLayouts *chlayouts; |
|
AVFilterFormats *samplerates; |
|
enum AVMediaType type = ctx->inputs && ctx->inputs [0] ? ctx->inputs [0]->type : |
|
ctx->outputs && ctx->outputs[0] ? ctx->outputs[0]->type : |
|
AVMEDIA_TYPE_VIDEO; |
|
|
|
if ((ret = ctx->filter->query_formats(ctx)) < 0) { |
|
av_log(ctx, AV_LOG_ERROR, "Query format failed for '%s': %s\n", |
|
ctx->name, av_err2str(ret)); |
|
return ret; |
|
} |
|
|
|
for (i = 0; i < ctx->nb_inputs; i++) |
|
sanitize_channel_layouts(ctx, ctx->inputs[i]->out_channel_layouts); |
|
for (i = 0; i < ctx->nb_outputs; i++) |
|
sanitize_channel_layouts(ctx, ctx->outputs[i]->in_channel_layouts); |
|
|
|
formats = ff_all_formats(type); |
|
if (!formats) |
|
return AVERROR(ENOMEM); |
|
ff_set_common_formats(ctx, formats); |
|
if (type == AVMEDIA_TYPE_AUDIO) { |
|
samplerates = ff_all_samplerates(); |
|
if (!samplerates) |
|
return AVERROR(ENOMEM); |
|
ff_set_common_samplerates(ctx, samplerates); |
|
chlayouts = ff_all_channel_layouts(); |
|
if (!chlayouts) |
|
return AVERROR(ENOMEM); |
|
ff_set_common_channel_layouts(ctx, chlayouts); |
|
} |
|
return 0; |
|
} |
|
|
|
static int query_formats(AVFilterGraph *graph, AVClass *log_ctx) |
|
{ |
|
int i, j, ret; |
|
int scaler_count = 0, resampler_count = 0; |
|
|
|
for (j = 0; j < 2; j++) { |
|
/* ask all the sub-filters for their supported media formats */ |
|
for (i = 0; i < graph->filter_count; i++) { |
|
/* Call query_formats on sources first. |
|
This is a temporary workaround for amerge, |
|
until format renegociation is implemented. */ |
|
if (!graph->filters[i]->nb_inputs == j) |
|
continue; |
|
if (graph->filters[i]->filter->query_formats) |
|
ret = filter_query_formats(graph->filters[i]); |
|
else |
|
ret = ff_default_query_formats(graph->filters[i]); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
} |
|
|
|
/* go through and merge as many format lists as possible */ |
|
for (i = 0; i < graph->filter_count; i++) { |
|
AVFilterContext *filter = graph->filters[i]; |
|
|
|
for (j = 0; j < filter->nb_inputs; j++) { |
|
AVFilterLink *link = filter->inputs[j]; |
|
int convert_needed = 0; |
|
|
|
if (!link) |
|
continue; |
|
|
|
if (link->in_formats != link->out_formats && |
|
!ff_merge_formats(link->in_formats, link->out_formats, |
|
link->type)) |
|
convert_needed = 1; |
|
if (link->type == AVMEDIA_TYPE_AUDIO) { |
|
if (link->in_channel_layouts != link->out_channel_layouts && |
|
!ff_merge_channel_layouts(link->in_channel_layouts, |
|
link->out_channel_layouts)) |
|
convert_needed = 1; |
|
if (link->in_samplerates != link->out_samplerates && |
|
!ff_merge_samplerates(link->in_samplerates, |
|
link->out_samplerates)) |
|
convert_needed = 1; |
|
} |
|
|
|
if (convert_needed) { |
|
AVFilterContext *convert; |
|
AVFilter *filter; |
|
AVFilterLink *inlink, *outlink; |
|
char scale_args[256]; |
|
char inst_name[30]; |
|
|
|
/* couldn't merge format lists. auto-insert conversion filter */ |
|
switch (link->type) { |
|
case AVMEDIA_TYPE_VIDEO: |
|
if (!(filter = avfilter_get_by_name("scale"))) { |
|
av_log(log_ctx, AV_LOG_ERROR, "'scale' filter " |
|
"not present, cannot convert pixel formats.\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
snprintf(inst_name, sizeof(inst_name), "auto-inserted scaler %d", |
|
scaler_count++); |
|
if (graph->scale_sws_opts) |
|
snprintf(scale_args, sizeof(scale_args), "0:0:%s", graph->scale_sws_opts); |
|
else |
|
snprintf(scale_args, sizeof(scale_args), "0:0"); |
|
|
|
if ((ret = avfilter_graph_create_filter(&convert, filter, |
|
inst_name, scale_args, NULL, |
|
graph)) < 0) |
|
return ret; |
|
break; |
|
case AVMEDIA_TYPE_AUDIO: |
|
if (!(filter = avfilter_get_by_name("aresample"))) { |
|
av_log(log_ctx, AV_LOG_ERROR, "'aresample' filter " |
|
"not present, cannot convert audio formats.\n"); |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
snprintf(inst_name, sizeof(inst_name), "auto-inserted resampler %d", |
|
resampler_count++); |
|
scale_args[0] = '\0'; |
|
if (graph->aresample_swr_opts) |
|
snprintf(scale_args, sizeof(scale_args), "%s", |
|
graph->aresample_swr_opts); |
|
if ((ret = avfilter_graph_create_filter(&convert, filter, |
|
inst_name, graph->aresample_swr_opts, |
|
NULL, graph)) < 0) |
|
return ret; |
|
break; |
|
default: |
|
return AVERROR(EINVAL); |
|
} |
|
|
|
if ((ret = avfilter_insert_filter(link, convert, 0, 0)) < 0) |
|
return ret; |
|
|
|
filter_query_formats(convert); |
|
inlink = convert->inputs[0]; |
|
outlink = convert->outputs[0]; |
|
if (!ff_merge_formats( inlink->in_formats, inlink->out_formats, inlink->type) || |
|
!ff_merge_formats(outlink->in_formats, outlink->out_formats, outlink->type)) |
|
ret |= AVERROR(ENOSYS); |
|
if (inlink->type == AVMEDIA_TYPE_AUDIO && |
|
(!ff_merge_samplerates(inlink->in_samplerates, |
|
inlink->out_samplerates) || |
|
!ff_merge_channel_layouts(inlink->in_channel_layouts, |
|
inlink->out_channel_layouts))) |
|
ret |= AVERROR(ENOSYS); |
|
if (outlink->type == AVMEDIA_TYPE_AUDIO && |
|
(!ff_merge_samplerates(outlink->in_samplerates, |
|
outlink->out_samplerates) || |
|
!ff_merge_channel_layouts(outlink->in_channel_layouts, |
|
outlink->out_channel_layouts))) |
|
ret |= AVERROR(ENOSYS); |
|
|
|
if (ret < 0) { |
|
av_log(log_ctx, AV_LOG_ERROR, |
|
"Impossible to convert between the formats supported by the filter " |
|
"'%s' and the filter '%s'\n", link->src->name, link->dst->name); |
|
return ret; |
|
} |
|
} |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static int pick_format(AVFilterLink *link, AVFilterLink *ref) |
|
{ |
|
if (!link || !link->in_formats) |
|
return 0; |
|
|
|
if (link->type == AVMEDIA_TYPE_VIDEO) { |
|
if(ref && ref->type == AVMEDIA_TYPE_VIDEO){ |
|
int has_alpha= av_pix_fmt_desc_get(ref->format)->nb_components % 2 == 0; |
|
enum AVPixelFormat best= AV_PIX_FMT_NONE; |
|
int i; |
|
for (i=0; i<link->in_formats->format_count; i++) { |
|
enum AVPixelFormat p = link->in_formats->formats[i]; |
|
best= avcodec_find_best_pix_fmt_of_2(best, p, ref->format, has_alpha, NULL); |
|
} |
|
av_log(link->src,AV_LOG_DEBUG, "picking %s out of %d ref:%s alpha:%d\n", |
|
av_get_pix_fmt_name(best), link->in_formats->format_count, |
|
av_get_pix_fmt_name(ref->format), has_alpha); |
|
link->in_formats->formats[0] = best; |
|
} |
|
} |
|
|
|
link->in_formats->format_count = 1; |
|
link->format = link->in_formats->formats[0]; |
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO) { |
|
if (!link->in_samplerates->format_count) { |
|
av_log(link->src, AV_LOG_ERROR, "Cannot select sample rate for" |
|
" the link between filters %s and %s.\n", link->src->name, |
|
link->dst->name); |
|
return AVERROR(EINVAL); |
|
} |
|
link->in_samplerates->format_count = 1; |
|
link->sample_rate = link->in_samplerates->formats[0]; |
|
|
|
if (link->in_channel_layouts->all_layouts) { |
|
av_log(link->src, AV_LOG_ERROR, "Cannot select channel layout for" |
|
" the link between filters %s and %s.\n", link->src->name, |
|
link->dst->name); |
|
return AVERROR(EINVAL); |
|
} |
|
link->in_channel_layouts->nb_channel_layouts = 1; |
|
link->channel_layout = link->in_channel_layouts->channel_layouts[0]; |
|
if ((link->channels = FF_LAYOUT2COUNT(link->channel_layout))) |
|
link->channel_layout = 0; |
|
else |
|
link->channels = av_get_channel_layout_nb_channels(link->channel_layout); |
|
} |
|
|
|
ff_formats_unref(&link->in_formats); |
|
ff_formats_unref(&link->out_formats); |
|
ff_formats_unref(&link->in_samplerates); |
|
ff_formats_unref(&link->out_samplerates); |
|
ff_channel_layouts_unref(&link->in_channel_layouts); |
|
ff_channel_layouts_unref(&link->out_channel_layouts); |
|
|
|
return 0; |
|
} |
|
|
|
#define REDUCE_FORMATS(fmt_type, list_type, list, var, nb, add_format) \ |
|
do { \ |
|
for (i = 0; i < filter->nb_inputs; i++) { \ |
|
AVFilterLink *link = filter->inputs[i]; \ |
|
fmt_type fmt; \ |
|
\ |
|
if (!link->out_ ## list || link->out_ ## list->nb != 1) \ |
|
continue; \ |
|
fmt = link->out_ ## list->var[0]; \ |
|
\ |
|
for (j = 0; j < filter->nb_outputs; j++) { \ |
|
AVFilterLink *out_link = filter->outputs[j]; \ |
|
list_type *fmts; \ |
|
\ |
|
if (link->type != out_link->type || \ |
|
out_link->in_ ## list->nb == 1) \ |
|
continue; \ |
|
fmts = out_link->in_ ## list; \ |
|
\ |
|
if (!out_link->in_ ## list->nb) { \ |
|
add_format(&out_link->in_ ##list, fmt); \ |
|
break; \ |
|
} \ |
|
\ |
|
for (k = 0; k < out_link->in_ ## list->nb; k++) \ |
|
if (fmts->var[k] == fmt) { \ |
|
fmts->var[0] = fmt; \ |
|
fmts->nb = 1; \ |
|
ret = 1; \ |
|
break; \ |
|
} \ |
|
} \ |
|
} \ |
|
} while (0) |
|
|
|
static int reduce_formats_on_filter(AVFilterContext *filter) |
|
{ |
|
int i, j, k, ret = 0; |
|
|
|
REDUCE_FORMATS(int, AVFilterFormats, formats, formats, |
|
format_count, ff_add_format); |
|
REDUCE_FORMATS(int, AVFilterFormats, samplerates, formats, |
|
format_count, ff_add_format); |
|
|
|
/* reduce channel layouts */ |
|
for (i = 0; i < filter->nb_inputs; i++) { |
|
AVFilterLink *inlink = filter->inputs[i]; |
|
uint64_t fmt; |
|
|
|
if (!inlink->out_channel_layouts || |
|
inlink->out_channel_layouts->nb_channel_layouts != 1) |
|
continue; |
|
fmt = inlink->out_channel_layouts->channel_layouts[0]; |
|
|
|
for (j = 0; j < filter->nb_outputs; j++) { |
|
AVFilterLink *outlink = filter->outputs[j]; |
|
AVFilterChannelLayouts *fmts; |
|
|
|
fmts = outlink->in_channel_layouts; |
|
if (inlink->type != outlink->type || fmts->nb_channel_layouts == 1) |
|
continue; |
|
|
|
if (fmts->all_layouts) { |
|
/* Turn the infinite list into a singleton */ |
|
fmts->all_layouts = fmts->all_counts = 0; |
|
ff_add_channel_layout(&outlink->in_channel_layouts, fmt); |
|
break; |
|
} |
|
|
|
for (k = 0; k < outlink->in_channel_layouts->nb_channel_layouts; k++) { |
|
if (fmts->channel_layouts[k] == fmt) { |
|
fmts->channel_layouts[0] = fmt; |
|
fmts->nb_channel_layouts = 1; |
|
ret = 1; |
|
break; |
|
} |
|
} |
|
} |
|
} |
|
|
|
return ret; |
|
} |
|
|
|
static void reduce_formats(AVFilterGraph *graph) |
|
{ |
|
int i, reduced; |
|
|
|
do { |
|
reduced = 0; |
|
|
|
for (i = 0; i < graph->filter_count; i++) |
|
reduced |= reduce_formats_on_filter(graph->filters[i]); |
|
} while (reduced); |
|
} |
|
|
|
static void swap_samplerates_on_filter(AVFilterContext *filter) |
|
{ |
|
AVFilterLink *link = NULL; |
|
int sample_rate; |
|
int i, j; |
|
|
|
for (i = 0; i < filter->nb_inputs; i++) { |
|
link = filter->inputs[i]; |
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO && |
|
link->out_samplerates->format_count == 1) |
|
break; |
|
} |
|
if (i == filter->nb_inputs) |
|
return; |
|
|
|
sample_rate = link->out_samplerates->formats[0]; |
|
|
|
for (i = 0; i < filter->nb_outputs; i++) { |
|
AVFilterLink *outlink = filter->outputs[i]; |
|
int best_idx, best_diff = INT_MAX; |
|
|
|
if (outlink->type != AVMEDIA_TYPE_AUDIO || |
|
outlink->in_samplerates->format_count < 2) |
|
continue; |
|
|
|
for (j = 0; j < outlink->in_samplerates->format_count; j++) { |
|
int diff = abs(sample_rate - outlink->in_samplerates->formats[j]); |
|
|
|
if (diff < best_diff) { |
|
best_diff = diff; |
|
best_idx = j; |
|
} |
|
} |
|
FFSWAP(int, outlink->in_samplerates->formats[0], |
|
outlink->in_samplerates->formats[best_idx]); |
|
} |
|
} |
|
|
|
static void swap_samplerates(AVFilterGraph *graph) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < graph->filter_count; i++) |
|
swap_samplerates_on_filter(graph->filters[i]); |
|
} |
|
|
|
#define CH_CENTER_PAIR (AV_CH_FRONT_LEFT_OF_CENTER | AV_CH_FRONT_RIGHT_OF_CENTER) |
|
#define CH_FRONT_PAIR (AV_CH_FRONT_LEFT | AV_CH_FRONT_RIGHT) |
|
#define CH_STEREO_PAIR (AV_CH_STEREO_LEFT | AV_CH_STEREO_RIGHT) |
|
#define CH_WIDE_PAIR (AV_CH_WIDE_LEFT | AV_CH_WIDE_RIGHT) |
|
#define CH_SIDE_PAIR (AV_CH_SIDE_LEFT | AV_CH_SIDE_RIGHT) |
|
#define CH_DIRECT_PAIR (AV_CH_SURROUND_DIRECT_LEFT | AV_CH_SURROUND_DIRECT_RIGHT) |
|
#define CH_BACK_PAIR (AV_CH_BACK_LEFT | AV_CH_BACK_RIGHT) |
|
|
|
/* allowable substitutions for channel pairs when comparing layouts, |
|
* ordered by priority for both values */ |
|
static const uint64_t ch_subst[][2] = { |
|
{ CH_FRONT_PAIR, CH_CENTER_PAIR }, |
|
{ CH_FRONT_PAIR, CH_WIDE_PAIR }, |
|
{ CH_FRONT_PAIR, AV_CH_FRONT_CENTER }, |
|
{ CH_CENTER_PAIR, CH_FRONT_PAIR }, |
|
{ CH_CENTER_PAIR, CH_WIDE_PAIR }, |
|
{ CH_CENTER_PAIR, AV_CH_FRONT_CENTER }, |
|
{ CH_WIDE_PAIR, CH_FRONT_PAIR }, |
|
{ CH_WIDE_PAIR, CH_CENTER_PAIR }, |
|
{ CH_WIDE_PAIR, AV_CH_FRONT_CENTER }, |
|
{ AV_CH_FRONT_CENTER, CH_FRONT_PAIR }, |
|
{ AV_CH_FRONT_CENTER, CH_CENTER_PAIR }, |
|
{ AV_CH_FRONT_CENTER, CH_WIDE_PAIR }, |
|
{ CH_SIDE_PAIR, CH_DIRECT_PAIR }, |
|
{ CH_SIDE_PAIR, CH_BACK_PAIR }, |
|
{ CH_SIDE_PAIR, AV_CH_BACK_CENTER }, |
|
{ CH_BACK_PAIR, CH_DIRECT_PAIR }, |
|
{ CH_BACK_PAIR, CH_SIDE_PAIR }, |
|
{ CH_BACK_PAIR, AV_CH_BACK_CENTER }, |
|
{ AV_CH_BACK_CENTER, CH_BACK_PAIR }, |
|
{ AV_CH_BACK_CENTER, CH_DIRECT_PAIR }, |
|
{ AV_CH_BACK_CENTER, CH_SIDE_PAIR }, |
|
}; |
|
|
|
static void swap_channel_layouts_on_filter(AVFilterContext *filter) |
|
{ |
|
AVFilterLink *link = NULL; |
|
int i, j, k; |
|
|
|
for (i = 0; i < filter->nb_inputs; i++) { |
|
link = filter->inputs[i]; |
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO && |
|
link->out_channel_layouts->nb_channel_layouts == 1) |
|
break; |
|
} |
|
if (i == filter->nb_inputs) |
|
return; |
|
|
|
for (i = 0; i < filter->nb_outputs; i++) { |
|
AVFilterLink *outlink = filter->outputs[i]; |
|
int best_idx = -1, best_score = INT_MIN, best_count_diff = INT_MAX; |
|
|
|
if (outlink->type != AVMEDIA_TYPE_AUDIO || |
|
outlink->in_channel_layouts->nb_channel_layouts < 2) |
|
continue; |
|
|
|
for (j = 0; j < outlink->in_channel_layouts->nb_channel_layouts; j++) { |
|
uint64_t in_chlayout = link->out_channel_layouts->channel_layouts[0]; |
|
uint64_t out_chlayout = outlink->in_channel_layouts->channel_layouts[j]; |
|
int in_channels = av_get_channel_layout_nb_channels(in_chlayout); |
|
int out_channels = av_get_channel_layout_nb_channels(out_chlayout); |
|
int count_diff = out_channels - in_channels; |
|
int matched_channels, extra_channels; |
|
int score = 100000; |
|
|
|
if (FF_LAYOUT2COUNT(in_chlayout) || FF_LAYOUT2COUNT(out_chlayout)) { |
|
/* Compute score in case the input or output layout encodes |
|
a channel count; in this case the score is not altered by |
|
the computation afterwards, as in_chlayout and |
|
out_chlayout have both been set to 0 */ |
|
if (FF_LAYOUT2COUNT(in_chlayout)) |
|
in_channels = FF_LAYOUT2COUNT(in_chlayout); |
|
if (FF_LAYOUT2COUNT(out_chlayout)) |
|
out_channels = FF_LAYOUT2COUNT(out_chlayout); |
|
score -= 10000 + FFABS(out_channels - in_channels) + |
|
(in_channels > out_channels ? 10000 : 0); |
|
in_chlayout = out_chlayout = 0; |
|
/* Let the remaining computation run, even if the score |
|
value is not altered */ |
|
} |
|
|
|
/* channel substitution */ |
|
for (k = 0; k < FF_ARRAY_ELEMS(ch_subst); k++) { |
|
uint64_t cmp0 = ch_subst[k][0]; |
|
uint64_t cmp1 = ch_subst[k][1]; |
|
if (( in_chlayout & cmp0) && (!(out_chlayout & cmp0)) && |
|
(out_chlayout & cmp1) && (!( in_chlayout & cmp1))) { |
|
in_chlayout &= ~cmp0; |
|
out_chlayout &= ~cmp1; |
|
/* add score for channel match, minus a deduction for |
|
having to do the substitution */ |
|
score += 10 * av_get_channel_layout_nb_channels(cmp1) - 2; |
|
} |
|
} |
|
|
|
/* no penalty for LFE channel mismatch */ |
|
if ( (in_chlayout & AV_CH_LOW_FREQUENCY) && |
|
(out_chlayout & AV_CH_LOW_FREQUENCY)) |
|
score += 10; |
|
in_chlayout &= ~AV_CH_LOW_FREQUENCY; |
|
out_chlayout &= ~AV_CH_LOW_FREQUENCY; |
|
|
|
matched_channels = av_get_channel_layout_nb_channels(in_chlayout & |
|
out_chlayout); |
|
extra_channels = av_get_channel_layout_nb_channels(out_chlayout & |
|
(~in_chlayout)); |
|
score += 10 * matched_channels - 5 * extra_channels; |
|
|
|
if (score > best_score || |
|
(count_diff < best_count_diff && score == best_score)) { |
|
best_score = score; |
|
best_idx = j; |
|
best_count_diff = count_diff; |
|
} |
|
} |
|
av_assert0(best_idx >= 0); |
|
FFSWAP(uint64_t, outlink->in_channel_layouts->channel_layouts[0], |
|
outlink->in_channel_layouts->channel_layouts[best_idx]); |
|
} |
|
|
|
} |
|
|
|
static void swap_channel_layouts(AVFilterGraph *graph) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < graph->filter_count; i++) |
|
swap_channel_layouts_on_filter(graph->filters[i]); |
|
} |
|
|
|
static void swap_sample_fmts_on_filter(AVFilterContext *filter) |
|
{ |
|
AVFilterLink *link = NULL; |
|
int format, bps; |
|
int i, j; |
|
|
|
for (i = 0; i < filter->nb_inputs; i++) { |
|
link = filter->inputs[i]; |
|
|
|
if (link->type == AVMEDIA_TYPE_AUDIO && |
|
link->out_formats->format_count == 1) |
|
break; |
|
} |
|
if (i == filter->nb_inputs) |
|
return; |
|
|
|
format = link->out_formats->formats[0]; |
|
bps = av_get_bytes_per_sample(format); |
|
|
|
for (i = 0; i < filter->nb_outputs; i++) { |
|
AVFilterLink *outlink = filter->outputs[i]; |
|
int best_idx = -1, best_score = INT_MIN; |
|
|
|
if (outlink->type != AVMEDIA_TYPE_AUDIO || |
|
outlink->in_formats->format_count < 2) |
|
continue; |
|
|
|
for (j = 0; j < outlink->in_formats->format_count; j++) { |
|
int out_format = outlink->in_formats->formats[j]; |
|
int out_bps = av_get_bytes_per_sample(out_format); |
|
int score; |
|
|
|
if (av_get_packed_sample_fmt(out_format) == format || |
|
av_get_planar_sample_fmt(out_format) == format) { |
|
best_idx = j; |
|
break; |
|
} |
|
|
|
/* for s32 and float prefer double to prevent loss of information */ |
|
if (bps == 4 && out_bps == 8) { |
|
best_idx = j; |
|
break; |
|
} |
|
|
|
/* prefer closest higher or equal bps */ |
|
score = -abs(out_bps - bps); |
|
if (out_bps >= bps) |
|
score += INT_MAX/2; |
|
|
|
if (score > best_score) { |
|
best_score = score; |
|
best_idx = j; |
|
} |
|
} |
|
av_assert0(best_idx >= 0); |
|
FFSWAP(int, outlink->in_formats->formats[0], |
|
outlink->in_formats->formats[best_idx]); |
|
} |
|
} |
|
|
|
static void swap_sample_fmts(AVFilterGraph *graph) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < graph->filter_count; i++) |
|
swap_sample_fmts_on_filter(graph->filters[i]); |
|
|
|
} |
|
|
|
static int pick_formats(AVFilterGraph *graph) |
|
{ |
|
int i, j, ret; |
|
int change; |
|
|
|
do{ |
|
change = 0; |
|
for (i = 0; i < graph->filter_count; i++) { |
|
AVFilterContext *filter = graph->filters[i]; |
|
if (filter->nb_inputs){ |
|
for (j = 0; j < filter->nb_inputs; j++){ |
|
if(filter->inputs[j]->in_formats && filter->inputs[j]->in_formats->format_count == 1) { |
|
if ((ret = pick_format(filter->inputs[j], NULL)) < 0) |
|
return ret; |
|
change = 1; |
|
} |
|
} |
|
} |
|
if (filter->nb_outputs){ |
|
for (j = 0; j < filter->nb_outputs; j++){ |
|
if(filter->outputs[j]->in_formats && filter->outputs[j]->in_formats->format_count == 1) { |
|
if ((ret = pick_format(filter->outputs[j], NULL)) < 0) |
|
return ret; |
|
change = 1; |
|
} |
|
} |
|
} |
|
if (filter->nb_inputs && filter->nb_outputs && filter->inputs[0]->format>=0) { |
|
for (j = 0; j < filter->nb_outputs; j++) { |
|
if(filter->outputs[j]->format<0) { |
|
if ((ret = pick_format(filter->outputs[j], filter->inputs[0])) < 0) |
|
return ret; |
|
change = 1; |
|
} |
|
} |
|
} |
|
} |
|
}while(change); |
|
|
|
for (i = 0; i < graph->filter_count; i++) { |
|
AVFilterContext *filter = graph->filters[i]; |
|
|
|
for (j = 0; j < filter->nb_inputs; j++) |
|
if ((ret = pick_format(filter->inputs[j], NULL)) < 0) |
|
return ret; |
|
for (j = 0; j < filter->nb_outputs; j++) |
|
if ((ret = pick_format(filter->outputs[j], NULL)) < 0) |
|
return ret; |
|
} |
|
return 0; |
|
} |
|
|
|
/** |
|
* Configure the formats of all the links in the graph. |
|
*/ |
|
static int graph_config_formats(AVFilterGraph *graph, AVClass *log_ctx) |
|
{ |
|
int ret; |
|
|
|
/* find supported formats from sub-filters, and merge along links */ |
|
if ((ret = query_formats(graph, log_ctx)) < 0) |
|
return ret; |
|
|
|
/* Once everything is merged, it's possible that we'll still have |
|
* multiple valid media format choices. We try to minimize the amount |
|
* of format conversion inside filters */ |
|
reduce_formats(graph); |
|
|
|
/* for audio filters, ensure the best format, sample rate and channel layout |
|
* is selected */ |
|
swap_sample_fmts(graph); |
|
swap_samplerates(graph); |
|
swap_channel_layouts(graph); |
|
|
|
if ((ret = pick_formats(graph)) < 0) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
static int ff_avfilter_graph_config_pointers(AVFilterGraph *graph, |
|
AVClass *log_ctx) |
|
{ |
|
unsigned i, j; |
|
int sink_links_count = 0, n = 0; |
|
AVFilterContext *f; |
|
AVFilterLink **sinks; |
|
|
|
for (i = 0; i < graph->filter_count; i++) { |
|
f = graph->filters[i]; |
|
for (j = 0; j < f->nb_inputs; j++) { |
|
f->inputs[j]->graph = graph; |
|
f->inputs[j]->age_index = -1; |
|
} |
|
for (j = 0; j < f->nb_outputs; j++) { |
|
f->outputs[j]->graph = graph; |
|
f->outputs[j]->age_index= -1; |
|
} |
|
if (!f->nb_outputs) { |
|
if (f->nb_inputs > INT_MAX - sink_links_count) |
|
return AVERROR(EINVAL); |
|
sink_links_count += f->nb_inputs; |
|
} |
|
} |
|
sinks = av_calloc(sink_links_count, sizeof(*sinks)); |
|
if (!sinks) |
|
return AVERROR(ENOMEM); |
|
for (i = 0; i < graph->filter_count; i++) { |
|
f = graph->filters[i]; |
|
if (!f->nb_outputs) { |
|
for (j = 0; j < f->nb_inputs; j++) { |
|
sinks[n] = f->inputs[j]; |
|
f->inputs[j]->age_index = n++; |
|
} |
|
} |
|
} |
|
av_assert0(n == sink_links_count); |
|
graph->sink_links = sinks; |
|
graph->sink_links_count = sink_links_count; |
|
return 0; |
|
} |
|
|
|
static int graph_insert_fifos(AVFilterGraph *graph, AVClass *log_ctx) |
|
{ |
|
AVFilterContext *f; |
|
int i, j, ret; |
|
int fifo_count = 0; |
|
|
|
for (i = 0; i < graph->filter_count; i++) { |
|
f = graph->filters[i]; |
|
|
|
for (j = 0; j < f->nb_inputs; j++) { |
|
AVFilterLink *link = f->inputs[j]; |
|
AVFilterContext *fifo_ctx; |
|
AVFilter *fifo; |
|
char name[32]; |
|
|
|
if (!link->dstpad->needs_fifo) |
|
continue; |
|
|
|
fifo = f->inputs[j]->type == AVMEDIA_TYPE_VIDEO ? |
|
avfilter_get_by_name("fifo") : |
|
avfilter_get_by_name("afifo"); |
|
|
|
snprintf(name, sizeof(name), "auto-inserted fifo %d", fifo_count++); |
|
|
|
ret = avfilter_graph_create_filter(&fifo_ctx, fifo, name, NULL, |
|
NULL, graph); |
|
if (ret < 0) |
|
return ret; |
|
|
|
ret = avfilter_insert_filter(link, fifo_ctx, 0, 0); |
|
if (ret < 0) |
|
return ret; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
int avfilter_graph_config(AVFilterGraph *graphctx, void *log_ctx) |
|
{ |
|
int ret; |
|
|
|
if ((ret = graph_check_validity(graphctx, log_ctx))) |
|
return ret; |
|
if ((ret = graph_insert_fifos(graphctx, log_ctx)) < 0) |
|
return ret; |
|
if ((ret = graph_config_formats(graphctx, log_ctx))) |
|
return ret; |
|
if ((ret = graph_config_links(graphctx, log_ctx))) |
|
return ret; |
|
if ((ret = ff_avfilter_graph_config_pointers(graphctx, log_ctx))) |
|
return ret; |
|
|
|
return 0; |
|
} |
|
|
|
int avfilter_graph_send_command(AVFilterGraph *graph, const char *target, const char *cmd, const char *arg, char *res, int res_len, int flags) |
|
{ |
|
int i, r = AVERROR(ENOSYS); |
|
|
|
if(!graph) |
|
return r; |
|
|
|
if((flags & AVFILTER_CMD_FLAG_ONE) && !(flags & AVFILTER_CMD_FLAG_FAST)) { |
|
r=avfilter_graph_send_command(graph, target, cmd, arg, res, res_len, flags | AVFILTER_CMD_FLAG_FAST); |
|
if(r != AVERROR(ENOSYS)) |
|
return r; |
|
} |
|
|
|
if(res_len && res) |
|
res[0]= 0; |
|
|
|
for (i = 0; i < graph->filter_count; i++) { |
|
AVFilterContext *filter = graph->filters[i]; |
|
if(!strcmp(target, "all") || (filter->name && !strcmp(target, filter->name)) || !strcmp(target, filter->filter->name)){ |
|
r = avfilter_process_command(filter, cmd, arg, res, res_len, flags); |
|
if(r != AVERROR(ENOSYS)) { |
|
if((flags & AVFILTER_CMD_FLAG_ONE) || r<0) |
|
return r; |
|
} |
|
} |
|
} |
|
|
|
return r; |
|
} |
|
|
|
int avfilter_graph_queue_command(AVFilterGraph *graph, const char *target, const char *command, const char *arg, int flags, double ts) |
|
{ |
|
int i; |
|
|
|
if(!graph) |
|
return 0; |
|
|
|
for (i = 0; i < graph->filter_count; i++) { |
|
AVFilterContext *filter = graph->filters[i]; |
|
if(filter && (!strcmp(target, "all") || !strcmp(target, filter->name) || !strcmp(target, filter->filter->name))){ |
|
AVFilterCommand **queue = &filter->command_queue, *next; |
|
while (*queue && (*queue)->time <= ts) |
|
queue = &(*queue)->next; |
|
next = *queue; |
|
*queue = av_mallocz(sizeof(AVFilterCommand)); |
|
(*queue)->command = av_strdup(command); |
|
(*queue)->arg = av_strdup(arg); |
|
(*queue)->time = ts; |
|
(*queue)->flags = flags; |
|
(*queue)->next = next; |
|
if(flags & AVFILTER_CMD_FLAG_ONE) |
|
return 0; |
|
} |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static void heap_bubble_up(AVFilterGraph *graph, |
|
AVFilterLink *link, int index) |
|
{ |
|
AVFilterLink **links = graph->sink_links; |
|
|
|
while (index) { |
|
int parent = (index - 1) >> 1; |
|
if (links[parent]->current_pts >= link->current_pts) |
|
break; |
|
links[index] = links[parent]; |
|
links[index]->age_index = index; |
|
index = parent; |
|
} |
|
links[index] = link; |
|
link->age_index = index; |
|
} |
|
|
|
static void heap_bubble_down(AVFilterGraph *graph, |
|
AVFilterLink *link, int index) |
|
{ |
|
AVFilterLink **links = graph->sink_links; |
|
|
|
while (1) { |
|
int child = 2 * index + 1; |
|
if (child >= graph->sink_links_count) |
|
break; |
|
if (child + 1 < graph->sink_links_count && |
|
links[child + 1]->current_pts < links[child]->current_pts) |
|
child++; |
|
if (link->current_pts < links[child]->current_pts) |
|
break; |
|
links[index] = links[child]; |
|
links[index]->age_index = index; |
|
index = child; |
|
} |
|
links[index] = link; |
|
link->age_index = index; |
|
} |
|
|
|
void ff_avfilter_graph_update_heap(AVFilterGraph *graph, AVFilterLink *link) |
|
{ |
|
heap_bubble_up (graph, link, link->age_index); |
|
heap_bubble_down(graph, link, link->age_index); |
|
} |
|
|
|
|
|
int avfilter_graph_request_oldest(AVFilterGraph *graph) |
|
{ |
|
while (graph->sink_links_count) { |
|
AVFilterLink *oldest = graph->sink_links[0]; |
|
int r = ff_request_frame(oldest); |
|
if (r != AVERROR_EOF) |
|
return r; |
|
av_log(oldest->dst, AV_LOG_DEBUG, "EOF on sink link %s:%s.\n", |
|
oldest->dst ? oldest->dst->name : "unknown", |
|
oldest->dstpad ? oldest->dstpad->name : "unknown"); |
|
/* EOF: remove the link from the heap */ |
|
if (oldest->age_index < --graph->sink_links_count) |
|
heap_bubble_down(graph, graph->sink_links[graph->sink_links_count], |
|
oldest->age_index); |
|
oldest->age_index = -1; |
|
} |
|
return AVERROR_EOF; |
|
}
|
|
|