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ffmpeg/fftools/ffmpeg_filter.c

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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"
// 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) {
avfilter_graph_set_auto_convert(ofilter->graph->graph,
AVFILTER_AUTO_CONVERT_NONE);
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 (OutputFilter *ofilter, AVBPrint *bprint) \
{ \
if (ofilter->var == none && !ofilter->supported_list) \
return; \
av_bprintf(bprint, #name "="); \
if (ofilter->var != none) { \
av_bprintf(bprint, printf_format, get_name(ofilter->var)); \
} else { \
const type *p; \
\
for (p = ofilter->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(OutputFilter *ofilter, AVBPrint *bprint)
{
if (av_channel_layout_check(&ofilter->ch_layout)) {
av_bprintf(bprint, "channel_layouts=");
av_channel_layout_describe_bprint(&ofilter->ch_layout, bprint);
} else if (ofilter->ch_layouts) {
const AVChannelLayout *p;
av_bprintf(bprint, "channel_layouts=");
for (p = ofilter->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);
}
int init_simple_filtergraph(InputStream *ist, OutputStream *ost)
{
FilterGraph *fg = av_mallocz(sizeof(*fg));
OutputFilter *ofilter;
InputFilter *ifilter;
if (!fg)
report_and_exit(AVERROR(ENOMEM));
fg->index = nb_filtergraphs;
ofilter = ALLOC_ARRAY_ELEM(fg->outputs, fg->nb_outputs);
ofilter->ost = ost;
ofilter->graph = fg;
ofilter->format = -1;
ost->filter = ofilter;
ifilter = ALLOC_ARRAY_ELEM(fg->inputs, fg->nb_inputs);
ifilter->ist = ist;
ifilter->graph = fg;
ifilter->format = -1;
ifilter->frame_queue = av_fifo_alloc2(8, sizeof(AVFrame*), AV_FIFO_FLAG_AUTO_GROW);
if (!ifilter->frame_queue)
report_and_exit(AVERROR(ENOMEM));
GROW_ARRAY(ist->filters, ist->nb_filters);
ist->filters[ist->nb_filters - 1] = ifilter;
GROW_ARRAY(filtergraphs, nb_filtergraphs);
filtergraphs[nb_filtergraphs - 1] = fg;
return 0;
}
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 void init_input_filter(FilterGraph *fg, AVFilterInOut *in)
{
InputStream *ist = NULL;
enum AVMediaType type = avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx);
InputFilter *ifilter;
int i;
// TODO: support other filter types
if (type != AVMEDIA_TYPE_VIDEO && type != AVMEDIA_TYPE_AUDIO) {
av_log(NULL, AV_LOG_FATAL, "Only video and audio filters supported "
"currently.\n");
exit_program(1);
}
if (in->name) {
AVFormatContext *s;
AVStream *st = NULL;
char *p;
int file_idx = strtol(in->name, &p, 0);
if (file_idx < 0 || file_idx >= nb_input_files) {
av_log(NULL, AV_LOG_FATAL, "Invalid file index %d in filtergraph description %s.\n",
file_idx, fg->graph_desc);
exit_program(1);
}
s = input_files[file_idx]->ctx;
for (i = 0; i < s->nb_streams; i++) {
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(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
"matches no streams.\n", p, fg->graph_desc);
exit_program(1);
}
ist = input_files[file_idx]->streams[st->index];
if (ist->user_set_discard == AVDISCARD_ALL) {
av_log(NULL, AV_LOG_FATAL, "Stream specifier '%s' in filtergraph description %s "
"matches a disabled input stream.\n", p, fg->graph_desc);
exit_program(1);
}
} else {
/* find the first unused stream of corresponding type */
for (ist = ist_iter(NULL); ist; ist = ist_iter(ist)) {
if (ist->user_set_discard == AVDISCARD_ALL)
continue;
if (ist->dec_ctx->codec_type == type && ist->discard)
break;
}
if (!ist) {
av_log(NULL, AV_LOG_FATAL, "Cannot find a matching stream for "
"unlabeled input pad %d on filter %s\n", in->pad_idx,
in->filter_ctx->name);
exit_program(1);
}
}
av_assert0(ist);
ist->discard = 0;
ist->decoding_needed |= DECODING_FOR_FILTER;
ist->processing_needed = 1;
ist->st->discard = AVDISCARD_NONE;
ifilter = ALLOC_ARRAY_ELEM(fg->inputs, fg->nb_inputs);
ifilter->ist = ist;
ifilter->graph = fg;
ifilter->format = -1;
ifilter->type = ist->st->codecpar->codec_type;
ifilter->name = describe_filter_link(fg, in, 1);
ifilter->frame_queue = av_fifo_alloc2(8, sizeof(AVFrame*), AV_FIFO_FLAG_AUTO_GROW);
if (!ifilter->frame_queue)
report_and_exit(AVERROR(ENOMEM));
GROW_ARRAY(ist->filters, ist->nb_filters);
ist->filters[ist->nb_filters - 1] = ifilter;
}
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;
return 0;
fail:
avio_close(io);
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;
}
int init_complex_filtergraph(FilterGraph *fg)
{
AVFilterInOut *inputs, *outputs, *cur;
AVFilterGraph *graph;
int ret = 0;
/* 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, fg->graph_desc, &inputs, &outputs, NULL);
if (ret < 0)
goto fail;
for (cur = inputs; cur; cur = cur->next)
init_input_filter(fg, cur);
for (cur = outputs; cur;) {
OutputFilter *const ofilter = ALLOC_ARRAY_ELEM(fg->outputs, fg->nb_outputs);
ofilter->graph = fg;
ofilter->out_tmp = cur;
ofilter->type = avfilter_pad_get_type(cur->filter_ctx->output_pads,
cur->pad_idx);
ofilter->name = describe_filter_link(fg, cur, 0);
cur = cur->next;
ofilter->out_tmp->next = NULL;
}
fail:
avfilter_inout_free(&inputs);
avfilter_graph_free(&graph);
return ret;
}
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)
{
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 ((ofilter->width || ofilter->height) && ofilter->ost->autoscale) {
char args[255];
AVFilterContext *filter;
const AVDictionaryEntry *e = NULL;
snprintf(args, sizeof(args), "%d:%d",
ofilter->width, ofilter->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;
}
if (ost->frame_rate.num && 0) {
AVFilterContext *fps;
char args[255];
snprintf(args, sizeof(args), "fps=%d/%d", ost->frame_rate.num,
ost->frame_rate.den);
snprintf(name, sizeof(name), "fps_out_%d_%d",
ost->file_index, ost->index);
ret = avfilter_graph_create_filter(&fps, avfilter_get_by_name("fps"),
name, args, NULL, fg->graph);
if (ret < 0)
return ret;
ret = avfilter_link(last_filter, pad_idx, fps, 0);
if (ret < 0)
return ret;
last_filter = fps;
pad_idx = 0;
}
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)
{
OutputStream *ost = ofilter->ost;
OutputFile *of = output_files[ost->file_index];
AVCodecContext *codec = ost->enc_ctx;
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(NULL, 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
if (codec->ch_layout.order == AV_CHANNEL_ORDER_UNSPEC)
av_channel_layout_default(&codec->ch_layout, codec->ch_layout.nb_channels);
choose_sample_fmts(ofilter, &args);
choose_sample_rates(ofilter, &args);
choose_channel_layouts(ofilter, &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(NULL, 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(NULL, AV_LOG_FATAL, "Filter %s has an unconnected output\n", output->name);
exit_program(1);
}
}
}
}
static int sub2video_prepare(InputStream *ist, InputFilter *ifilter)
{
AVFormatContext *avf = input_files[ist->file_index]->ctx;
int i, w, h;
/* Compute the size of the canvas for the subtitles stream.
If the subtitles codecpar has set a size, use it. Otherwise use the
maximum dimensions of the video streams in the same file. */
w = ifilter->width;
h = ifilter->height;
if (!(w && h)) {
for (i = 0; i < avf->nb_streams; i++) {
if (avf->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
w = FFMAX(w, avf->streams[i]->codecpar->width);
h = FFMAX(h, avf->streams[i]->codecpar->height);
}
}
if (!(w && h)) {
w = FFMAX(w, 720);
h = FFMAX(h, 576);
}
av_log(avf, AV_LOG_INFO, "sub2video: using %dx%d canvas\n", w, h);
}
ist->sub2video.w = ifilter->width = w;
ist->sub2video.h = ifilter->height = h;
ifilter->width = ist->dec_ctx->width ? ist->dec_ctx->width : ist->sub2video.w;
ifilter->height = ist->dec_ctx->height ? ist->dec_ctx->height : ist->sub2video.h;
/* rectangles are AV_PIX_FMT_PAL8, but we have no guarantee that the
palettes for all rectangles are identical or compatible */
ifilter->format = AV_PIX_FMT_RGB32;
ist->sub2video.frame = av_frame_alloc();
if (!ist->sub2video.frame)
return AVERROR(ENOMEM);
ist->sub2video.last_pts = INT64_MIN;
ist->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. */
ist->sub2video.initialize = 1;
return 0;
}
static int configure_input_video_filter(FilterGraph *fg, InputFilter *ifilter,
AVFilterInOut *in)
{
AVFilterContext *last_filter;
const AVFilter *buffer_filt = avfilter_get_by_name("buffer");
const AVPixFmtDescriptor *desc;
InputStream *ist = ifilter->ist;
InputFile *f = input_files[ist->file_index];
AVRational tb = ist->framerate.num ? av_inv_q(ist->framerate) :
ist->st->time_base;
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(NULL, AV_LOG_ERROR, "Cannot connect video filter to audio input\n");
ret = AVERROR(EINVAL);
goto fail;
}
if (!fr.num)
fr = ist->framerate_guessed;
if (ist->dec_ctx->codec_type == AVMEDIA_TYPE_SUBTITLE) {
ret = sub2video_prepare(ist, ifilter);
if (ret < 0)
goto fail;
}
sar = ifilter->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",
ifilter->width, ifilter->height, ifilter->format,
tb.num, tb.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->st->index);
if ((ret = avfilter_graph_create_filter(&ifilter->filter, buffer_filt, name,
args.str, NULL, fg->graph)) < 0)
goto fail;
par->hw_frames_ctx = ifilter->hw_frames_ctx;
ret = av_buffersrc_parameters_set(ifilter->filter, par);
if (ret < 0)
goto fail;
av_freep(&par);
last_filter = ifilter->filter;
desc = av_pix_fmt_desc_get(ifilter->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 = ifilter->displaymatrix;
double theta;
if (!displaymatrix)
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->st->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)
{
AVFilterContext *last_filter;
const AVFilter *abuffer_filt = avfilter_get_by_name("abuffer");
InputStream *ist = ifilter->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(NULL, AV_LOG_ERROR, "Cannot connect audio filter to non audio input\n");
return AVERROR(EINVAL);
}
av_bprint_init(&args, 0, AV_BPRINT_SIZE_AUTOMATIC);
av_bprintf(&args, "time_base=%d/%d:sample_rate=%d:sample_fmt=%s",
1, ifilter->sample_rate,
ifilter->sample_rate,
av_get_sample_fmt_name(ifilter->format));
if (av_channel_layout_check(&ifilter->ch_layout) &&
ifilter->ch_layout.order != AV_CHANNEL_ORDER_UNSPEC) {
av_bprintf(&args, ":channel_layout=");
av_channel_layout_describe_bprint(&ifilter->ch_layout, &args);
} else
av_bprintf(&args, ":channels=%d", ifilter->ch_layout.nb_channels);
snprintf(name, sizeof(name), "graph_%d_in_%d_%d", fg->index,
ist->file_index, ist->st->index);
if ((ret = avfilter_graph_create_filter(&ifilter->filter, abuffer_filt,
name, args.str, NULL,
fg->graph)) < 0)
return ret;
last_filter = ifilter->filter;
#define AUTO_INSERT_FILTER_INPUT(opt_name, filter_name, arg) do { \
AVFilterContext *filt_ctx; \
\
av_log(NULL, AV_LOG_INFO, opt_name " is forwarded to lavfi " \
"similarly to -af " filter_name "=%s.\n", arg); \
\
snprintf(name, sizeof(name), "graph_%d_%s_in_%d_%d", \
fg->index, filter_name, ist->file_index, ist->st->index); \
ret = avfilter_graph_create_filter(&filt_ctx, \
avfilter_get_by_name(filter_name), \
name, arg, NULL, fg->graph); \
if (ret < 0) \
return ret; \
\
ret = avfilter_link(last_filter, 0, filt_ctx, 0); \
if (ret < 0) \
return ret; \
\
last_filter = filt_ctx; \
} while (0)
snprintf(name, sizeof(name), "trim for input stream %d:%d",
ist->file_index, ist->st->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)
{
if (!ifilter->ist->dec) {
av_log(NULL, AV_LOG_ERROR,
"No decoder for stream #%d:%d, filtering impossible\n",
ifilter->ist->file_index, ifilter->ist->st->index);
return AVERROR_DECODER_NOT_FOUND;
}
switch (avfilter_pad_get_type(in->filter_ctx->input_pads, in->pad_idx)) {
case AVMEDIA_TYPE_VIDEO: return configure_input_video_filter(fg, ifilter, in);
case AVMEDIA_TYPE_AUDIO: return configure_input_audio_filter(fg, ifilter, in);
default: av_assert0(0); 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++)
fg->inputs[i]->filter = (AVFilterContext *)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;
}
int configure_filtergraph(FilterGraph *fg)
{
AVBufferRef *hw_device;
AVFilterInOut *inputs, *outputs, *cur;
int ret, i, simple = filtergraph_is_simple(fg);
const char *graph_desc = simple ? fg->outputs[0]->ost->avfilter :
fg->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;
if (simple && (!inputs || inputs->next || !outputs || outputs->next)) {
const char *num_inputs;
const char *num_outputs;
if (!outputs) {
num_outputs = "0";
} else if (outputs->next) {
num_outputs = ">1";
} else {
num_outputs = "1";
}
if (!inputs) {
num_inputs = "0";
} else if (inputs->next) {
num_inputs = ">1";
} else {
num_inputs = "1";
}
av_log(NULL, AV_LOG_ERROR, "Simple filtergraph '%s' was expected "
"to have exactly 1 input and 1 output."
" However, it had %s input(s) and %s output(s)."
" Please adjust, or use a complex filtergraph (-filter_complex) instead.\n",
graph_desc, num_inputs, num_outputs);
ret = AVERROR(EINVAL);
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 (!auto_conversion_filters)
avfilter_graph_set_auto_convert(fg->graph, AVFILTER_AUTO_CONVERT_NONE);
if ((ret = avfilter_graph_config(fg->graph, NULL)) < 0)
goto fail;
fg->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];
AVFilterContext *sink = ofilter->filter;
ofilter->format = av_buffersink_get_format(sink);
ofilter->width = av_buffersink_get_w(sink);
ofilter->height = av_buffersink_get_h(sink);
ofilter->sample_rate = av_buffersink_get_sample_rate(sink);
av_channel_layout_uninit(&ofilter->ch_layout);
ret = av_buffersink_get_ch_layout(sink, &ofilter->ch_layout);
if (ret < 0)
goto fail;
}
fg->reconfiguration = 1;
for (i = 0; i < fg->nb_outputs; i++) {
OutputStream *ost = fg->outputs[i]->ost;
if (ost->enc_ctx->codec_type == AVMEDIA_TYPE_AUDIO &&
!(ost->enc_ctx->codec->capabilities & AV_CODEC_CAP_VARIABLE_FRAME_SIZE))
av_buffersink_set_frame_size(ost->filter->filter,
ost->enc_ctx->frame_size);
}
for (i = 0; i < fg->nb_inputs; i++) {
AVFrame *tmp;
while (av_fifo_read(fg->inputs[i]->frame_queue, &tmp, 1) >= 0) {
ret = av_buffersrc_add_frame(fg->inputs[i]->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++) {
if (fg->inputs[i]->eof) {
ret = av_buffersrc_add_frame(fg->inputs[i]->filter, NULL);
if (ret < 0)
goto fail;
}
}
/* process queued up subtitle packets */
for (i = 0; i < fg->nb_inputs; i++) {
InputStream *ist = fg->inputs[i]->ist;
if (ist->sub2video.sub_queue && ist->sub2video.frame) {
AVSubtitle tmp;
while (av_fifo_read(ist->sub2video.sub_queue, &tmp, 1) >= 0) {
sub2video_update(ist, INT64_MIN, &tmp);
avsubtitle_free(&tmp);
}
}
}
return 0;
fail:
cleanup_filtergraph(fg);
return ret;
}
int ifilter_parameters_from_frame(InputFilter *ifilter, const AVFrame *frame)
{
AVFrameSideData *sd;
int ret;
av_buffer_unref(&ifilter->hw_frames_ctx);
ifilter->format = frame->format;
ifilter->width = frame->width;
ifilter->height = frame->height;
ifilter->sample_aspect_ratio = frame->sample_aspect_ratio;
ifilter->sample_rate = frame->sample_rate;
ret = av_channel_layout_copy(&ifilter->ch_layout, &frame->ch_layout);
if (ret < 0)
return ret;
av_freep(&ifilter->displaymatrix);
sd = av_frame_get_side_data(frame, AV_FRAME_DATA_DISPLAYMATRIX);
if (sd)
ifilter->displaymatrix = av_memdup(sd->data, sizeof(int32_t) * 9);
if (frame->hw_frames_ctx) {
ifilter->hw_frames_ctx = av_buffer_ref(frame->hw_frames_ctx);
if (!ifilter->hw_frames_ctx)
return AVERROR(ENOMEM);
}
return 0;
}
int filtergraph_is_simple(FilterGraph *fg)
{
return !fg->graph_desc;
}
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