/* * 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 use direct rendering (no allocation of a new frame) * @todo support a PTS correction mechanism */ #include <float.h> #include <stdint.h> #include "libavutil/attributes.h" #include "libavutil/avstring.h" #include "libavutil/avassert.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 "formats.h" #include "internal.h" #include "video.h" typedef struct MovieStream { AVStream *st; AVCodecContext *codec_ctx; int64_t discontinuity_threshold; int64_t last_pts; } 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; AVFormatContext *format_ctx; 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 */ } 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 }, { NULL }, }; static int movie_config_output_props(AVFilterLink *outlink); static int movie_request_frame(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 open_stream(AVFilterContext *ctx, MovieStream *st) { 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); ret = avcodec_parameters_to_context(st->codec_ctx, st->st->codecpar); if (ret < 0) return ret; st->codec_ctx->thread_count = ff_filter_get_nb_threads(ctx); 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]; int64_t chl = av_get_default_channel_layout(dec_par->channels); if (!chl) { av_log(log_ctx, AV_LOG_ERROR, "Channel layout is not set in stream %d, and could not " "be guessed from the number of channels (%d)\n", st_index, dec_par->channels); return AVERROR(EINVAL); } av_get_channel_layout_string(buf, sizeof(buf), dec_par->channels, chl); 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); dec_par->channel_layout = chl; return 0; } 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, NULL)) < 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->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); } 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; pad.request_frame = movie_request_frame; if ((ret = ff_insert_outpad(ctx, i, &pad)) < 0) { av_freep(&pad.name); return ret; } if ( movie->st[i].st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && !movie->st[i].st->codecpar->channel_layout) { ret = guess_channel_layout(&movie->st[i], i, ctx); if (ret < 0) return ret; } ret = open_stream(ctx, &movie->st[i]); 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++) { av_freep(&ctx->output_pads[i].name); if (movie->st[i].st) avcodec_free_context(&movie->st[i].codec_ctx); } 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 }; int64_t list64[] = { 0, -1 }; 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->channel_layout; if ((ret = ff_channel_layouts_ref(ff_make_format64_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 char *describe_frame_to_str(char *dst, size_t dst_size, AVFrame *frame, enum AVMediaType frame_type, AVFilterLink *link) { switch (frame_type) { case AVMEDIA_TYPE_VIDEO: snprintf(dst, dst_size, "video pts:%s time:%s size:%dx%d aspect:%d/%d", av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base), frame->width, frame->height, frame->sample_aspect_ratio.num, frame->sample_aspect_ratio.den); break; case AVMEDIA_TYPE_AUDIO: snprintf(dst, dst_size, "audio pts:%s time:%s samples:%d", av_ts2str(frame->pts), av_ts2timestr(frame->pts, &link->time_base), frame->nb_samples); break; default: snprintf(dst, dst_size, "%s BUG", av_get_media_type_string(frame_type)); break; } return dst; } 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 movie_decode_packet(AVFilterContext *ctx) { MovieContext *movie = ctx->priv; AVPacket pkt = { 0 }; int pkt_out_id, ret; /* read a new packet from input stream */ ret = av_read_frame(movie->format_ctx, &pkt); if (ret == AVERROR_EOF) { /* EOF -> set all decoders for flushing */ for (int i = 0; i < ctx->nb_outputs; i++) { ret = avcodec_send_packet(movie->st[i].codec_ctx, NULL); if (ret < 0 && ret != AVERROR_EOF) return ret; } return 0; } else if (ret < 0) return ret; /* send the packet to its decoder, if any */ pkt_out_id = pkt.stream_index > movie->max_stream_index ? -1 : movie->out_index[pkt.stream_index]; if (pkt_out_id >= 0) ret = avcodec_send_packet(movie->st[pkt_out_id].codec_ctx, &pkt); av_packet_unref(&pkt); return ret; } /** * Try to push a frame to the requested output. * * @param ctx filter context * @param out_id number of output where a frame is wanted; * @return 0 if a frame was pushed on the requested output, * AVERROR(EAGAIN) if the decoder requires more input * AVERROR(EOF) if the decoder has been completely flushed * <0 AVERROR code */ static int movie_push_frame(AVFilterContext *ctx, unsigned out_id) { MovieContext *movie = ctx->priv; MovieStream *st = &movie->st[out_id]; AVFilterLink *outlink = ctx->outputs[out_id]; AVFrame *frame; int ret; frame = av_frame_alloc(); if (!frame) return AVERROR(ENOMEM); ret = avcodec_receive_frame(st->codec_ctx, frame); if (ret < 0) { if (ret != AVERROR_EOF && ret != AVERROR(EAGAIN)) av_log(ctx, AV_LOG_WARNING, "Decode error: %s\n", av_err2str(ret)); av_frame_free(&frame); 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", out_id, 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; } ff_dlog(ctx, "movie_push_frame(): file:'%s' %s\n", movie->file_name, describe_frame_to_str((char[1024]){0}, 1024, frame, st->st->codecpar->codec_type, outlink)); if (st->st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) { if (frame->format != outlink->format) { av_log(ctx, AV_LOG_ERROR, "Format changed %s -> %s, discarding frame\n", av_get_pix_fmt_name(outlink->format), av_get_pix_fmt_name(frame->format) ); av_frame_free(&frame); return 0; } } ret = ff_filter_frame(outlink, frame); if (ret < 0) return ret; return 0; } static int movie_request_frame(AVFilterLink *outlink) { AVFilterContext *ctx = outlink->src; MovieContext *movie = ctx->priv; unsigned out_id = FF_OUTLINK_IDX(outlink); while (1) { int got_eagain = 0, got_eof = 0; int ret = 0; /* check all decoders for available output */ for (int i = 0; i < ctx->nb_outputs; i++) { ret = movie_push_frame(ctx, i); if (ret == AVERROR(EAGAIN)) got_eagain++; else if (ret == AVERROR_EOF) got_eof++; else if (ret < 0) return ret; else if (i == out_id) return 0; } if (got_eagain) { /* all decoders require more input -> read a new packet */ ret = movie_decode_packet(ctx); if (ret < 0) return ret; } else if (got_eof) { /* all decoders flushed */ 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"); continue; } return AVERROR_EOF; } } } 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; } #if CONFIG_MOVIE_FILTER AVFILTER_DEFINE_CLASS(movie); 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, .uninit = movie_uninit, .query_formats = movie_query_formats, .inputs = NULL, .outputs = NULL, .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, .process_command = process_command }; #endif /* CONFIG_MOVIE_FILTER */ #if CONFIG_AMOVIE_FILTER #define amovie_options movie_options AVFILTER_DEFINE_CLASS(amovie); const AVFilter ff_avsrc_amovie = { .name = "amovie", .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."), .priv_size = sizeof(MovieContext), .init = movie_common_init, .uninit = movie_uninit, .query_formats = movie_query_formats, .inputs = NULL, .outputs = NULL, .priv_class = &amovie_class, .flags = AVFILTER_FLAG_DYNAMIC_OUTPUTS, .process_command = process_command, }; #endif /* CONFIG_AMOVIE_FILTER */