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FFmpeg/libavfilter/src_movie.c
Paul B Mahol 5fe6a0e5c7 avfilter/src_movie: switch to activate
2023-05-21 10:49:41 +02:00

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/*
* Copyright (c) 2010 Stefano Sabatini
* Copyright (c) 2008 Victor Paesa
*
* 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
*/
/**
* @file
* movie video source
*
* @todo support a PTS correction mechanism
*/
#include "config_components.h"
#include <float.h>
#include <stdint.h>
#include "libavutil/attributes.h"
#include "libavutil/avstring.h"
#include "libavutil/channel_layout.h"
#include "libavutil/opt.h"
#include "libavutil/imgutils.h"
#include "libavutil/internal.h"
#include "libavutil/timestamp.h"
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "audio.h"
#include "avfilter.h"
#include "filters.h"
#include "formats.h"
#include "internal.h"
#include "video.h"
typedef struct MovieStream {
AVStream *st;
AVCodecContext *codec_ctx;
int64_t discontinuity_threshold;
int64_t last_pts;
AVFrame *frame;
int eof;
} MovieStream;
typedef struct MovieContext {
/* common A/V fields */
const AVClass *class;
int64_t seek_point; ///< seekpoint in microseconds
double seek_point_d;
char *format_name;
char *file_name;
char *stream_specs; /**< user-provided list of streams, separated by + */
int stream_index; /**< for compatibility */
int loop_count;
int64_t discontinuity_threshold;
int64_t ts_offset;
int dec_threads;
AVPacket *pkt;
AVFormatContext *format_ctx;
int eof;
int max_stream_index; /**< max stream # actually used for output */
MovieStream *st; /**< array of all streams, one per output */
int *out_index; /**< stream number -> output number map, or -1 */
AVDictionary *format_opts;
} MovieContext;
#define OFFSET(x) offsetof(MovieContext, x)
#define FLAGS AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_VIDEO_PARAM
static const AVOption movie_options[]= {
{ "filename", NULL, OFFSET(file_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, .flags = FLAGS },
{ "stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, FLAGS },
{ "seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
{ "sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, { .dbl = 0 }, 0, (INT64_MAX-1) / 1000000, FLAGS },
{ "streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
{ "s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, 0, 0, FLAGS },
{ "loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, FLAGS },
{ "discontinuity", "set discontinuity threshold", OFFSET(discontinuity_threshold), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, INT64_MAX, FLAGS },
{ "dec_threads", "set the number of threads for decoding", OFFSET(dec_threads), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
{ "format_opts", "set format options for the opened file", OFFSET(format_opts), AV_OPT_TYPE_DICT, {.str = NULL}, 0, 0, FLAGS},
{ NULL },
};
static int movie_config_output_props(AVFilterLink *outlink);
static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
{
int i, ret, already = 0, stream_id = -1;
char type_char[2], dummy;
AVStream *found = NULL;
enum AVMediaType type;
ret = sscanf(spec, "d%1[av]%d%c", type_char, &stream_id, &dummy);
if (ret >= 1 && ret <= 2) {
type = type_char[0] == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
if (ret < 0) {
av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
av_get_media_type_string(type), stream_id);
return NULL;
}
return avf->streams[ret];
}
for (i = 0; i < avf->nb_streams; i++) {
ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
if (ret < 0) {
av_log(log, AV_LOG_ERROR,
"Invalid stream specifier \"%s\"\n", spec);
return NULL;
}
if (!ret)
continue;
if (avf->streams[i]->discard != AVDISCARD_ALL) {
already++;
continue;
}
if (found) {
av_log(log, AV_LOG_WARNING,
"Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
break;
}
found = avf->streams[i];
}
if (!found) {
av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
already ? "matched only already used streams" :
"did not match any stream");
return NULL;
}
if (found->codecpar->codec_type != AVMEDIA_TYPE_VIDEO &&
found->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
"currently unsupported by libavfilter\n", spec,
av_get_media_type_string(found->codecpar->codec_type));
return NULL;
}
return found;
}
static int get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
{
int linesize_align[AV_NUM_DATA_POINTERS];
AVFilterLink *outlink = frame->opaque;
int w, h, ow, oh, copy = 0;
AVFrame *new;
h = oh = frame->height;
w = ow = frame->width;
copy = frame->format != outlink->format;
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (w != outlink->w || h != outlink->h)
copy |= 1;
break;
case AVMEDIA_TYPE_AUDIO:
if (outlink->sample_rate != frame->sample_rate ||
av_channel_layout_compare(&outlink->ch_layout, &frame->ch_layout))
copy |= 1;
break;
}
if (copy || !(avctx->codec->capabilities & AV_CODEC_CAP_DR1))
return avcodec_default_get_buffer2(avctx, frame, flags);
switch (avctx->codec_type) {
case AVMEDIA_TYPE_VIDEO:
avcodec_align_dimensions2(avctx, &w, &h, linesize_align);
new = ff_default_get_video_buffer(outlink, w, h);
break;
case AVMEDIA_TYPE_AUDIO:
new = ff_default_get_audio_buffer(outlink, frame->nb_samples);
break;
default:
return -1;
}
av_frame_copy_props(new, frame);
av_frame_unref(frame);
av_frame_move_ref(frame, new);
av_frame_free(&new);
frame->opaque = outlink;
frame->width = ow;
frame->height = oh;
return 0;
}
static int open_stream(AVFilterContext *ctx, MovieStream *st, int dec_threads)
{
const AVCodec *codec;
int ret;
codec = avcodec_find_decoder(st->st->codecpar->codec_id);
if (!codec) {
av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n");
return AVERROR(EINVAL);
}
st->codec_ctx = avcodec_alloc_context3(codec);
if (!st->codec_ctx)
return AVERROR(ENOMEM);
st->codec_ctx->flags |= AV_CODEC_FLAG_COPY_OPAQUE;
st->codec_ctx->get_buffer2 = get_buffer;
ret = avcodec_parameters_to_context(st->codec_ctx, st->st->codecpar);
if (ret < 0)
return ret;
if (!dec_threads)
dec_threads = ff_filter_get_nb_threads(ctx);
st->codec_ctx->thread_count = dec_threads;
if ((ret = avcodec_open2(st->codec_ctx, codec, NULL)) < 0) {
av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n");
return ret;
}
return 0;
}
static int guess_channel_layout(MovieStream *st, int st_index, void *log_ctx)
{
AVCodecParameters *dec_par = st->st->codecpar;
char buf[256];
AVChannelLayout chl = { 0 };
av_channel_layout_default(&chl, dec_par->ch_layout.nb_channels);
if (!KNOWN(&chl)) {
av_log(log_ctx, AV_LOG_WARNING,
"Channel layout is not set in stream %d, and could not "
"be guessed from the number of channels (%d)\n",
st_index, dec_par->ch_layout.nb_channels);
return av_channel_layout_copy(&dec_par->ch_layout, &chl);
}
av_channel_layout_describe(&chl, buf, sizeof(buf));
av_log(log_ctx, AV_LOG_WARNING,
"Channel layout is not set in output stream %d, "
"guessed channel layout is '%s'\n",
st_index, buf);
return av_channel_layout_copy(&dec_par->ch_layout, &chl);
}
static av_cold int movie_common_init(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
const AVInputFormat *iformat = NULL;
int64_t timestamp;
int nb_streams = 1, ret, i;
char default_streams[16], *stream_specs, *spec, *cursor;
AVStream *st;
if (!movie->file_name) {
av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
return AVERROR(EINVAL);
}
movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
stream_specs = movie->stream_specs;
if (!stream_specs) {
snprintf(default_streams, sizeof(default_streams), "d%c%d",
!strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
movie->stream_index);
stream_specs = default_streams;
}
for (cursor = stream_specs; *cursor; cursor++)
if (*cursor == '+')
nb_streams++;
if (movie->loop_count != 1 && nb_streams != 1) {
av_log(ctx, AV_LOG_ERROR,
"Loop with several streams is currently unsupported\n");
return AVERROR_PATCHWELCOME;
}
// Try to find the movie format (container)
iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
movie->format_ctx = NULL;
if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, &movie->format_opts)) < 0) {
av_log(ctx, AV_LOG_ERROR,
"Failed to avformat_open_input '%s'\n", movie->file_name);
return ret;
}
if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
// if seeking requested, we execute it
if (movie->seek_point > 0) {
timestamp = movie->seek_point;
// add the stream start time, should it exist
if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
if (timestamp > 0 && movie->format_ctx->start_time > INT64_MAX - timestamp) {
av_log(ctx, AV_LOG_ERROR,
"%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
movie->file_name, movie->format_ctx->start_time, movie->seek_point);
return AVERROR(EINVAL);
}
timestamp += movie->format_ctx->start_time;
}
if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
movie->file_name, timestamp);
return ret;
}
}
for (i = 0; i < movie->format_ctx->nb_streams; i++)
movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
movie->pkt = av_packet_alloc();
if (!movie->pkt)
return AVERROR(ENOMEM);
movie->st = av_calloc(nb_streams, sizeof(*movie->st));
if (!movie->st)
return AVERROR(ENOMEM);
for (i = 0; i < nb_streams; i++) {
spec = av_strtok(stream_specs, "+", &cursor);
if (!spec)
return AVERROR_BUG;
stream_specs = NULL; /* for next strtok */
st = find_stream(ctx, movie->format_ctx, spec);
if (!st)
return AVERROR(EINVAL);
st->discard = AVDISCARD_DEFAULT;
movie->st[i].st = st;
movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
movie->st[i].discontinuity_threshold =
av_rescale_q(movie->discontinuity_threshold, AV_TIME_BASE_Q, st->time_base);
movie->st[i].frame = av_frame_alloc();
if (!movie->st[i].frame)
return AVERROR(ENOMEM);
}
if (av_strtok(NULL, "+", &cursor))
return AVERROR_BUG;
movie->out_index = av_calloc(movie->max_stream_index + 1,
sizeof(*movie->out_index));
if (!movie->out_index)
return AVERROR(ENOMEM);
for (i = 0; i <= movie->max_stream_index; i++)
movie->out_index[i] = -1;
for (i = 0; i < nb_streams; i++) {
AVFilterPad pad = { 0 };
movie->out_index[movie->st[i].st->index] = i;
pad.type = movie->st[i].st->codecpar->codec_type;
pad.name = av_asprintf("out%d", i);
if (!pad.name)
return AVERROR(ENOMEM);
pad.config_props = movie_config_output_props;
if ((ret = ff_append_outpad_free_name(ctx, &pad)) < 0)
return ret;
if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO &&
!KNOWN(&movie->st[i].st->codecpar->ch_layout)) {
ret = guess_channel_layout(&movie->st[i], i, ctx);
if (ret < 0)
return ret;
}
ret = open_stream(ctx, &movie->st[i], movie->dec_threads);
if (ret < 0)
return ret;
}
av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
movie->seek_point, movie->format_name, movie->file_name,
movie->stream_index);
return 0;
}
static av_cold void movie_uninit(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
int i;
for (i = 0; i < ctx->nb_outputs; i++) {
if (movie->st[i].st)
avcodec_free_context(&movie->st[i].codec_ctx);
av_frame_free(&movie->st[i].frame);
}
av_packet_free(&movie->pkt);
av_freep(&movie->st);
av_freep(&movie->out_index);
if (movie->format_ctx)
avformat_close_input(&movie->format_ctx);
}
static int movie_query_formats(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
int list[] = { 0, -1 };
AVChannelLayout list64[] = { { 0 }, { 0 } };
int i, ret;
for (i = 0; i < ctx->nb_outputs; i++) {
MovieStream *st = &movie->st[i];
AVCodecParameters *c = st->st->codecpar;
AVFilterLink *outlink = ctx->outputs[i];
switch (c->codec_type) {
case AVMEDIA_TYPE_VIDEO:
list[0] = c->format;
if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.formats)) < 0)
return ret;
break;
case AVMEDIA_TYPE_AUDIO:
list[0] = c->format;
if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.formats)) < 0)
return ret;
list[0] = c->sample_rate;
if ((ret = ff_formats_ref(ff_make_format_list(list), &outlink->incfg.samplerates)) < 0)
return ret;
list64[0] = c->ch_layout;
if ((ret = ff_channel_layouts_ref(ff_make_channel_layout_list(list64),
&outlink->incfg.channel_layouts)) < 0)
return ret;
break;
}
}
return 0;
}
static int movie_config_output_props(AVFilterLink *outlink)
{
AVFilterContext *ctx = outlink->src;
MovieContext *movie = ctx->priv;
unsigned out_id = FF_OUTLINK_IDX(outlink);
MovieStream *st = &movie->st[out_id];
AVCodecParameters *c = st->st->codecpar;
outlink->time_base = st->st->time_base;
switch (c->codec_type) {
case AVMEDIA_TYPE_VIDEO:
outlink->w = c->width;
outlink->h = c->height;
outlink->frame_rate = st->st->r_frame_rate;
break;
case AVMEDIA_TYPE_AUDIO:
break;
}
return 0;
}
static int rewind_file(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
int64_t timestamp = movie->seek_point;
int ret, i;
if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
timestamp += movie->format_ctx->start_time;
ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
if (ret < 0) {
av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
movie->loop_count = 1; /* do not try again */
return ret;
}
for (i = 0; i < ctx->nb_outputs; i++) {
avcodec_flush_buffers(movie->st[i].codec_ctx);
}
return 0;
}
static int flush_decoder(AVFilterContext *ctx, int i)
{
MovieContext *movie = ctx->priv;
AVCodecContext *dec = movie->st[i].codec_ctx;
return avcodec_send_packet(dec, NULL);
}
static int decode_packet(AVFilterContext *ctx, int i)
{
AVFilterLink *outlink = ctx->outputs[i];
MovieContext *movie = ctx->priv;
MovieStream *st = &movie->st[i];
AVCodecContext *dec = movie->st[i].codec_ctx;
AVFrame *frame = movie->st[i].frame;
AVPacket *pkt = movie->pkt;
int ret = 0;
// submit the packet to the decoder
if (!movie->eof) {
ret = avcodec_send_packet(dec, pkt);
if (ret < 0)
return ret;
}
// get all the available frames from the decoder
if (ret >= 0) {
ret = avcodec_receive_frame(dec, frame);
if (ret < 0) {
// those two return values are special and mean there is no output
// frame available, but there were no errors during decoding
if (ret == AVERROR_EOF || ret == AVERROR(EAGAIN))
return 0;
return ret;
}
frame->pts = frame->best_effort_timestamp;
if (frame->pts != AV_NOPTS_VALUE) {
if (movie->ts_offset)
frame->pts += av_rescale_q_rnd(movie->ts_offset, AV_TIME_BASE_Q, outlink->time_base, AV_ROUND_UP);
if (st->discontinuity_threshold) {
if (st->last_pts != AV_NOPTS_VALUE) {
int64_t diff = frame->pts - st->last_pts;
if (diff < 0 || diff > st->discontinuity_threshold) {
av_log(ctx, AV_LOG_VERBOSE, "Discontinuity in stream:%d diff:%"PRId64"\n", i, diff);
movie->ts_offset += av_rescale_q_rnd(-diff, outlink->time_base, AV_TIME_BASE_Q, AV_ROUND_UP);
frame->pts -= diff;
}
}
}
st->last_pts = frame->pts;
}
ret = ff_filter_frame(outlink, av_frame_clone(frame));
if (ret < 0)
return ret;
if (ret == 0)
return 1;
}
return 0;
}
static int activate(AVFilterContext *ctx)
{
MovieContext *movie = ctx->priv;
int wanted = 0, ret;
for (int i = 0; i < ctx->nb_outputs; i++) {
if (ff_outlink_frame_wanted(ctx->outputs[i]))
wanted++;
}
if (wanted == 0)
return FFERROR_NOT_READY;
if (!movie->eof) {
ret = av_read_frame(movie->format_ctx, movie->pkt);
if (ret < 0) {
movie->eof = 1;
for (int i = 0; i < ctx->nb_outputs; i++)
flush_decoder(ctx, i);
ff_filter_set_ready(ctx, 100);
return 0;
} else {
int pkt_out_id = movie->pkt->stream_index > movie->max_stream_index ? -1 :
movie->out_index[movie->pkt->stream_index];
if (pkt_out_id >= 0) {
movie->pkt->opaque = ctx->outputs[pkt_out_id];
ret = decode_packet(ctx, pkt_out_id);
}
av_packet_unref(movie->pkt);
ff_filter_set_ready(ctx, 100);
return (ret <= 0) ? ret : 0;
}
} else {
int nb_eofs = 0;
for (int i = 0; i < ctx->nb_outputs; i++) {
if (!movie->st[i].eof) {
ret = decode_packet(ctx, i);
if (ret <= 0)
movie->st[i].eof = 1;
}
nb_eofs += movie->st[i].eof == 1;
}
if (nb_eofs == ctx->nb_outputs && movie->loop_count != 1) {
ret = rewind_file(ctx);
if (ret < 0)
return ret;
movie->loop_count -= movie->loop_count > 1;
av_log(ctx, AV_LOG_VERBOSE, "Stream finished, looping.\n");
ff_filter_set_ready(ctx, 100);
for (int i = 0; i < ctx->nb_outputs; i++)
movie->st[i].eof = 0;
movie->eof = 0;
return 0;
} else {
for (int i = 0; i < ctx->nb_outputs; i++) {
if (movie->st[i].eof) {
ff_outlink_set_status(ctx->outputs[i], AVERROR_EOF, movie->st[i].last_pts);
nb_eofs++;
}
}
}
if (nb_eofs < ctx->nb_outputs)
ff_filter_set_ready(ctx, 100);
return 0;
}
return FFERROR_NOT_READY;
}
static int process_command(AVFilterContext *ctx, const char *cmd, const char *args,
char *res, int res_len, int flags)
{
MovieContext *movie = ctx->priv;
int ret = AVERROR(ENOSYS);
if (!strcmp(cmd, "seek")) {
int idx, flags, i;
int64_t ts;
char tail[2];
if (sscanf(args, "%i|%"SCNi64"|%i %1s", &idx, &ts, &flags, tail) != 3)
return AVERROR(EINVAL);
ret = av_seek_frame(movie->format_ctx, idx, ts, flags);
if (ret < 0)
return ret;
for (i = 0; i < ctx->nb_outputs; i++) {
avcodec_flush_buffers(movie->st[i].codec_ctx);
}
return ret;
} else if (!strcmp(cmd, "get_duration")) {
int print_len;
char tail[2];
if (!res || res_len <= 0)
return AVERROR(EINVAL);
if (args && sscanf(args, "%1s", tail) == 1)
return AVERROR(EINVAL);
print_len = snprintf(res, res_len, "%"PRId64, movie->format_ctx->duration);
if (print_len < 0 || print_len >= res_len)
return AVERROR(EINVAL);
return 0;
}
return ret;
}
AVFILTER_DEFINE_CLASS_EXT(movie, "(a)movie", movie_options);
#if CONFIG_MOVIE_FILTER
const AVFilter ff_avsrc_movie = {
.name = "movie",
.description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
.priv_size = sizeof(MovieContext),
.priv_class = &movie_class,
.init = movie_common_init,
.activate = activate,
.uninit = movie_uninit,
FILTER_QUERY_FUNC(movie_query_formats),
.inputs = NULL,
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
.process_command = process_command
};
#endif /* CONFIG_MOVIE_FILTER */
#if CONFIG_AMOVIE_FILTER
const AVFilter ff_avsrc_amovie = {
.name = "amovie",
.description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
.priv_class = &movie_class,
.priv_size = sizeof(MovieContext),
.init = movie_common_init,
.activate = activate,
.uninit = movie_uninit,
FILTER_QUERY_FUNC(movie_query_formats),
.inputs = NULL,
.outputs = NULL,
.flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS,
.process_command = process_command,
};
#endif /* CONFIG_AMOVIE_FILTER */
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