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https://github.com/FFmpeg/FFmpeg.git
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32390d6767
Since the recent changes, movie and amovie are able to deal with more than one type of stream, so they should be categorized as "multimedia sources" rather than audio/video sources.
598 lines
20 KiB
C
598 lines
20 KiB
C
/*
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* Copyright (c) 2010 Stefano Sabatini
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* Copyright (c) 2008 Victor Paesa
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* movie video source
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*
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* @todo use direct rendering (no allocation of a new frame)
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* @todo support a PTS correction mechanism
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*/
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/* #define DEBUG */
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#include <float.h>
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#include "libavutil/avstring.h"
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#include "libavutil/avassert.h"
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#include "libavutil/opt.h"
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#include "libavutil/imgutils.h"
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#include "libavutil/timestamp.h"
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#include "libavformat/avformat.h"
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#include "audio.h"
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#include "avcodec.h"
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#include "avfilter.h"
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#include "formats.h"
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#include "internal.h"
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#include "video.h"
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typedef struct {
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AVStream *st;
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int done;
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} MovieStream;
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typedef struct {
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/* common A/V fields */
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const AVClass *class;
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int64_t seek_point; ///< seekpoint in microseconds
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double seek_point_d;
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char *format_name;
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char *file_name;
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char *stream_specs; /**< user-provided list of streams, separated by + */
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int stream_index; /**< for compatibility */
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int loop_count;
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AVFormatContext *format_ctx;
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int eof;
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AVPacket pkt, pkt0;
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AVFrame *frame; ///< video frame to store the decoded images in
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int max_stream_index; /**< max stream # actually used for output */
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MovieStream *st; /**< array of all streams, one per output */
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int *out_index; /**< stream number -> output number map, or -1 */
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} MovieContext;
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#define OFFSET(x) offsetof(MovieContext, x)
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static const AVOption movie_options[]= {
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{"format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
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{"f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX },
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{"streams", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX },
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{"s", "set streams", OFFSET(stream_specs), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MAX, CHAR_MAX },
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{"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
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{"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX },
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{"seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
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{"sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 },
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{"loop", "set loop count", OFFSET(loop_count), AV_OPT_TYPE_INT, {.dbl = 1}, 0, INT_MAX },
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{NULL},
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};
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AVFILTER_DEFINE_CLASS(movie);
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static int movie_config_output_props(AVFilterLink *outlink);
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static int movie_request_frame(AVFilterLink *outlink);
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static AVStream *find_stream(void *log, AVFormatContext *avf, const char *spec)
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{
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int i, ret, already = 0, stream_id = -1;
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char type_char, dummy;
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AVStream *found = NULL;
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enum AVMediaType type;
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ret = sscanf(spec, "d%[av]%d%c", &type_char, &stream_id, &dummy);
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if (ret >= 1 && ret <= 2) {
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type = type_char == 'v' ? AVMEDIA_TYPE_VIDEO : AVMEDIA_TYPE_AUDIO;
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ret = av_find_best_stream(avf, type, stream_id, -1, NULL, 0);
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if (ret < 0) {
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av_log(log, AV_LOG_ERROR, "No %s stream with index '%d' found\n",
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av_get_media_type_string(type), stream_id);
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return NULL;
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}
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return avf->streams[ret];
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}
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for (i = 0; i < avf->nb_streams; i++) {
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ret = avformat_match_stream_specifier(avf, avf->streams[i], spec);
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if (ret < 0) {
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av_log(log, AV_LOG_ERROR,
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"Invalid stream specifier \"%s\"\n", spec);
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return NULL;
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}
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if (!ret)
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continue;
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if (avf->streams[i]->discard != AVDISCARD_ALL) {
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already++;
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continue;
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}
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if (found) {
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av_log(log, AV_LOG_WARNING,
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"Ambiguous stream specifier \"%s\", using #%d\n", spec, i);
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break;
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}
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found = avf->streams[i];
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}
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if (!found) {
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av_log(log, AV_LOG_WARNING, "Stream specifier \"%s\" %s\n", spec,
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already ? "matched only already used streams" :
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"did not match any stream");
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return NULL;
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}
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if (found->codec->codec_type != AVMEDIA_TYPE_VIDEO &&
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found->codec->codec_type != AVMEDIA_TYPE_AUDIO) {
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av_log(log, AV_LOG_ERROR, "Stream specifier \"%s\" matched a %s stream,"
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"currently unsupported by libavfilter\n", spec,
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av_get_media_type_string(found->codec->codec_type));
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return NULL;
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}
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return found;
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}
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static int open_stream(void *log, MovieStream *st)
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{
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AVCodec *codec;
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int ret;
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codec = avcodec_find_decoder(st->st->codec->codec_id);
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if (!codec) {
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av_log(log, AV_LOG_ERROR, "Failed to find any codec\n");
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return AVERROR(EINVAL);
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}
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if ((ret = avcodec_open2(st->st->codec, codec, NULL)) < 0) {
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av_log(log, AV_LOG_ERROR, "Failed to open codec\n");
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return ret;
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}
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return 0;
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}
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static av_cold int movie_init(AVFilterContext *ctx, const char *args)
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{
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MovieContext *movie = ctx->priv;
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AVInputFormat *iformat = NULL;
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int64_t timestamp;
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int nb_streams, ret, i;
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char default_streams[16], *stream_specs, *spec, *cursor;
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char name[16];
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AVStream *st;
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movie->class = &movie_class;
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av_opt_set_defaults(movie);
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if (args)
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movie->file_name = av_get_token(&args, ":");
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if (!movie->file_name || !*movie->file_name) {
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av_log(ctx, AV_LOG_ERROR, "No filename provided!\n");
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return AVERROR(EINVAL);
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}
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if (*args++ == ':' && (ret = av_set_options_string(movie, args, "=", ":")) < 0) {
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av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args);
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return ret;
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}
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movie->seek_point = movie->seek_point_d * 1000000 + 0.5;
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stream_specs = movie->stream_specs;
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if (!stream_specs) {
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snprintf(default_streams, sizeof(default_streams), "d%c%d",
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!strcmp(ctx->filter->name, "amovie") ? 'a' : 'v',
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movie->stream_index);
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stream_specs = default_streams;
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}
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for (cursor = stream_specs, nb_streams = 1; *cursor; cursor++)
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if (*cursor == '+')
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nb_streams++;
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if (movie->loop_count != 1 && nb_streams != 1) {
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av_log(ctx, AV_LOG_ERROR,
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"Loop with several streams is currently unsupported\n");
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return AVERROR_PATCHWELCOME;
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}
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av_register_all();
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// Try to find the movie format (container)
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iformat = movie->format_name ? av_find_input_format(movie->format_name) : NULL;
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movie->format_ctx = NULL;
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if ((ret = avformat_open_input(&movie->format_ctx, movie->file_name, iformat, NULL)) < 0) {
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av_log(ctx, AV_LOG_ERROR,
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"Failed to avformat_open_input '%s'\n", movie->file_name);
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return ret;
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}
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if ((ret = avformat_find_stream_info(movie->format_ctx, NULL)) < 0)
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av_log(ctx, AV_LOG_WARNING, "Failed to find stream info\n");
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// if seeking requested, we execute it
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if (movie->seek_point > 0) {
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timestamp = movie->seek_point;
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// add the stream start time, should it exist
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if (movie->format_ctx->start_time != AV_NOPTS_VALUE) {
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if (timestamp > INT64_MAX - movie->format_ctx->start_time) {
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av_log(ctx, AV_LOG_ERROR,
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"%s: seek value overflow with start_time:%"PRId64" seek_point:%"PRId64"\n",
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movie->file_name, movie->format_ctx->start_time, movie->seek_point);
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return AVERROR(EINVAL);
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}
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timestamp += movie->format_ctx->start_time;
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}
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if ((ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD)) < 0) {
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av_log(ctx, AV_LOG_ERROR, "%s: could not seek to position %"PRId64"\n",
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movie->file_name, timestamp);
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return ret;
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}
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}
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for (i = 0; i < movie->format_ctx->nb_streams; i++)
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movie->format_ctx->streams[i]->discard = AVDISCARD_ALL;
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movie->st = av_calloc(nb_streams, sizeof(*movie->st));
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if (!movie->st)
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return AVERROR(ENOMEM);
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for (i = 0; i < nb_streams; i++) {
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spec = av_strtok(stream_specs, "+", &cursor);
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if (!spec)
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return AVERROR_BUG;
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stream_specs = NULL; /* for next strtok */
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st = find_stream(ctx, movie->format_ctx, spec);
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if (!st)
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return AVERROR(EINVAL);
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st->discard = AVDISCARD_DEFAULT;
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movie->st[i].st = st;
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movie->max_stream_index = FFMAX(movie->max_stream_index, st->index);
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}
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if (av_strtok(NULL, "+", &cursor))
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return AVERROR_BUG;
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movie->out_index = av_calloc(movie->max_stream_index + 1,
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sizeof(*movie->out_index));
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if (!movie->out_index)
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return AVERROR(ENOMEM);
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for (i = 0; i <= movie->max_stream_index; i++)
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movie->out_index[i] = -1;
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for (i = 0; i < nb_streams; i++)
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movie->out_index[movie->st[i].st->index] = i;
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for (i = 0; i < nb_streams; i++) {
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AVFilterPad pad = { 0 };
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snprintf(name, sizeof(name), "out%d", i);
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pad.type = movie->st[i].st->codec->codec_type;
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pad.name = av_strdup(name);
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pad.config_props = movie_config_output_props;
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pad.request_frame = movie_request_frame;
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ff_insert_outpad(ctx, i, &pad);
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ret = open_stream(ctx, &movie->st[i]);
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if (ret < 0)
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return ret;
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}
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if (!(movie->frame = avcodec_alloc_frame()) ) {
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av_log(log, AV_LOG_ERROR, "Failed to alloc frame\n");
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return AVERROR(ENOMEM);
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}
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av_log(ctx, AV_LOG_VERBOSE, "seek_point:%"PRIi64" format_name:%s file_name:%s stream_index:%d\n",
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movie->seek_point, movie->format_name, movie->file_name,
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movie->stream_index);
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return 0;
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}
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static av_cold void movie_uninit(AVFilterContext *ctx)
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{
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MovieContext *movie = ctx->priv;
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int i;
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for (i = 0; i < ctx->nb_outputs; i++) {
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av_freep(&ctx->output_pads[i].name);
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if (movie->st[i].st)
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avcodec_close(movie->st[i].st->codec);
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}
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av_opt_free(movie);
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av_freep(&movie->file_name);
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av_freep(&movie->st);
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av_freep(&movie->out_index);
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av_freep(&movie->frame);
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if (movie->format_ctx)
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avformat_close_input(&movie->format_ctx);
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}
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static int movie_query_formats(AVFilterContext *ctx)
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{
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MovieContext *movie = ctx->priv;
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int list[] = { 0, -1 };
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int64_t list64[] = { 0, -1 };
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int i;
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for (i = 0; i < ctx->nb_outputs; i++) {
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MovieStream *st = &movie->st[i];
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AVCodecContext *c = st->st->codec;
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AVFilterLink *outlink = ctx->outputs[i];
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switch (c->codec_type) {
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case AVMEDIA_TYPE_VIDEO:
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list[0] = c->pix_fmt;
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ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
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break;
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case AVMEDIA_TYPE_AUDIO:
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list[0] = c->sample_fmt;
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ff_formats_ref(ff_make_format_list(list), &outlink->in_formats);
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list[0] = c->sample_rate;
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ff_formats_ref(ff_make_format_list(list), &outlink->in_samplerates);
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list64[0] = c->channel_layout ? c->channel_layout :
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av_get_default_channel_layout(c->channels);
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ff_channel_layouts_ref(avfilter_make_format64_list(list64),
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&outlink->in_channel_layouts);
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break;
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}
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}
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return 0;
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}
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static int movie_config_output_props(AVFilterLink *outlink)
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{
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AVFilterContext *ctx = outlink->src;
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MovieContext *movie = ctx->priv;
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unsigned out_id = FF_OUTLINK_IDX(outlink);
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MovieStream *st = &movie->st[out_id];
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AVCodecContext *c = st->st->codec;
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outlink->time_base = st->st->time_base;
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switch (c->codec_type) {
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case AVMEDIA_TYPE_VIDEO:
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outlink->w = c->width;
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outlink->h = c->height;
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outlink->frame_rate = st->st->r_frame_rate;
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break;
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case AVMEDIA_TYPE_AUDIO:
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break;
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}
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return 0;
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}
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static AVFilterBufferRef *frame_to_buf(enum AVMediaType type, AVFrame *frame,
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AVFilterLink *outlink)
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{
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AVFilterBufferRef *buf, *copy;
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buf = avfilter_get_buffer_ref_from_frame(type, frame,
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AV_PERM_WRITE |
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AV_PERM_PRESERVE |
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AV_PERM_REUSE2);
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if (!buf)
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return NULL;
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buf->pts = av_frame_get_best_effort_timestamp(frame);
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copy = ff_copy_buffer_ref(outlink, buf);
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if (!copy)
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return NULL;
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buf->buf->data[0] = NULL; /* it belongs to the frame */
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avfilter_unref_buffer(buf);
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return copy;
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}
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static char *describe_bufref_to_str(char *dst, size_t dst_size,
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AVFilterBufferRef *buf,
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AVFilterLink *link)
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{
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switch (buf->type) {
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case AVMEDIA_TYPE_VIDEO:
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snprintf(dst, dst_size,
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"video pts:%s time:%s pos:%"PRId64" size:%dx%d aspect:%d/%d",
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av_ts2str(buf->pts), av_ts2timestr(buf->pts, &link->time_base),
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buf->pos, buf->video->w, buf->video->h,
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buf->video->sample_aspect_ratio.num,
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buf->video->sample_aspect_ratio.den);
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break;
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case AVMEDIA_TYPE_AUDIO:
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snprintf(dst, dst_size,
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"audio pts:%s time:%s pos:%"PRId64" samples:%d",
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av_ts2str(buf->pts), av_ts2timestr(buf->pts, &link->time_base),
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buf->pos, buf->audio->nb_samples);
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break;
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default:
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snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(buf->type));
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break;
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}
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return dst;
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}
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#define describe_bufref(buf, link) \
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describe_bufref_to_str((char[1024]){0}, 1024, buf, link)
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static int rewind_file(AVFilterContext *ctx)
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{
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MovieContext *movie = ctx->priv;
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int64_t timestamp = movie->seek_point;
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int ret, i;
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if (movie->format_ctx->start_time != AV_NOPTS_VALUE)
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timestamp += movie->format_ctx->start_time;
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ret = av_seek_frame(movie->format_ctx, -1, timestamp, AVSEEK_FLAG_BACKWARD);
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if (ret < 0) {
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av_log(ctx, AV_LOG_ERROR, "Unable to loop: %s\n", av_err2str(ret));
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movie->loop_count = 1; /* do not try again */
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return ret;
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}
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for (i = 0; i < ctx->nb_outputs; i++) {
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avcodec_flush_buffers(movie->st[i].st->codec);
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movie->st[i].done = 0;
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}
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movie->eof = 0;
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return 0;
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}
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/**
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* Try to push a frame to the requested output.
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*
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* @return 1 if a frame was pushed on the requested output,
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* 0 if another attempt is possible,
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* <0 AVERROR code
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*/
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static int movie_push_frame(AVFilterContext *ctx, unsigned out_id)
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{
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MovieContext *movie = ctx->priv;
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AVPacket *pkt = &movie->pkt;
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MovieStream *st;
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int ret, got_frame = 0, pkt_out_id;
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AVFilterLink *outlink;
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AVFilterBufferRef *buf;
|
|
|
|
if (!pkt->size) {
|
|
if (movie->eof) {
|
|
if (movie->st[out_id].done) {
|
|
if (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");
|
|
return 0; /* retry */
|
|
}
|
|
return AVERROR_EOF;
|
|
}
|
|
/* packet is already ready for flushing */
|
|
} else {
|
|
ret = av_read_frame(movie->format_ctx, &movie->pkt0);
|
|
if (ret < 0) {
|
|
av_init_packet(&movie->pkt0); /* ready for flushing */
|
|
*pkt = movie->pkt0;
|
|
if (ret == AVERROR_EOF) {
|
|
movie->eof = 1;
|
|
return 0; /* start flushing */
|
|
}
|
|
return ret;
|
|
}
|
|
*pkt = movie->pkt0;
|
|
}
|
|
}
|
|
|
|
pkt_out_id = pkt->stream_index > movie->max_stream_index ? -1 :
|
|
movie->out_index[pkt->stream_index];
|
|
if (pkt_out_id < 0) {
|
|
av_free_packet(&movie->pkt0);
|
|
pkt->size = 0; /* ready for next run */
|
|
pkt->data = NULL;
|
|
return 0;
|
|
}
|
|
st = &movie->st[pkt_out_id];
|
|
outlink = ctx->outputs[pkt_out_id];
|
|
|
|
switch (st->st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
ret = avcodec_decode_video2(st->st->codec, movie->frame, &got_frame, pkt);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
ret = avcodec_decode_audio4(st->st->codec, movie->frame, &got_frame, pkt);
|
|
break;
|
|
default:
|
|
ret = AVERROR(ENOSYS);
|
|
break;
|
|
}
|
|
if (ret < 0) {
|
|
av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret));
|
|
return 0;
|
|
}
|
|
if (!ret)
|
|
ret = pkt->size;
|
|
|
|
pkt->data += ret;
|
|
pkt->size -= ret;
|
|
if (pkt->size <= 0) {
|
|
av_free_packet(&movie->pkt0);
|
|
pkt->size = 0; /* ready for next run */
|
|
pkt->data = NULL;
|
|
}
|
|
if (!got_frame) {
|
|
if (!ret)
|
|
st->done = 1;
|
|
return 0;
|
|
}
|
|
|
|
buf = frame_to_buf(st->st->codec->codec_type, movie->frame, outlink);
|
|
if (!buf)
|
|
return AVERROR(ENOMEM);
|
|
av_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name,
|
|
describe_bufref(buf, outlink));
|
|
switch (st->st->codec->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO:
|
|
if (!movie->frame->sample_aspect_ratio.num)
|
|
buf->video->sample_aspect_ratio = st->st->sample_aspect_ratio;
|
|
ff_start_frame(outlink, buf);
|
|
ff_draw_slice(outlink, 0, outlink->h, 1);
|
|
ff_end_frame(outlink);
|
|
break;
|
|
case AVMEDIA_TYPE_AUDIO:
|
|
ff_filter_samples(outlink, buf);
|
|
break;
|
|
}
|
|
|
|
return pkt_out_id == out_id;
|
|
}
|
|
|
|
static int movie_request_frame(AVFilterLink *outlink)
|
|
{
|
|
AVFilterContext *ctx = outlink->src;
|
|
unsigned out_id = FF_OUTLINK_IDX(outlink);
|
|
int ret;
|
|
|
|
while (1) {
|
|
ret = movie_push_frame(ctx, out_id);
|
|
if (ret)
|
|
return FFMIN(ret, 0);
|
|
}
|
|
}
|
|
|
|
#if CONFIG_MOVIE_FILTER
|
|
|
|
AVFilter avfilter_avsrc_movie = {
|
|
.name = "movie",
|
|
.description = NULL_IF_CONFIG_SMALL("Read from a movie source."),
|
|
.priv_size = sizeof(MovieContext),
|
|
.init = movie_init,
|
|
.uninit = movie_uninit,
|
|
.query_formats = movie_query_formats,
|
|
|
|
.inputs = (const AVFilterPad[]) {{ .name = NULL }},
|
|
.outputs = (const AVFilterPad[]) {{ .name = NULL }},
|
|
};
|
|
|
|
#endif /* CONFIG_MOVIE_FILTER */
|
|
|
|
#if CONFIG_AMOVIE_FILTER
|
|
|
|
AVFilter avfilter_avsrc_amovie = {
|
|
.name = "amovie",
|
|
.description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."),
|
|
.priv_size = sizeof(MovieContext),
|
|
.init = movie_init,
|
|
.uninit = movie_uninit,
|
|
.query_formats = movie_query_formats,
|
|
|
|
.inputs = (const AVFilterPad[]) {{ .name = NULL }},
|
|
.outputs = (const AVFilterPad[]) {{ .name = NULL }},
|
|
};
|
|
|
|
#endif /* CONFIG_AMOVIE_FILTER */
|