| /* |
| * 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 |
| * @todo support more than one output stream |
| */ |
| |
| /* #define DEBUG */ |
| |
| #include <float.h> |
| #include "libavutil/avstring.h" |
| #include "libavutil/opt.h" |
| #include "libavutil/imgutils.h" |
| #include "libavformat/avformat.h" |
| #include "avcodec.h" |
| #include "avfilter.h" |
| |
| typedef struct { |
| /* common A/V fields */ |
| const AVClass *class; |
| int64_t seek_point; ///< seekpoint in microseconds |
| double seek_point_d; |
| char *format_name; |
| char *file_name; |
| int stream_index; |
| |
| AVFormatContext *format_ctx; |
| AVCodecContext *codec_ctx; |
| int is_done; |
| AVFrame *frame; ///< video frame to store the decoded images in |
| |
| /* video-only fields */ |
| int w, h; |
| AVFilterBufferRef *picref; |
| |
| /* audio-only fields */ |
| int bps; ///< bytes per sample |
| AVPacket pkt, pkt0; |
| AVFilterBufferRef *samplesref; |
| } MovieContext; |
| |
| #define OFFSET(x) offsetof(MovieContext, x) |
| |
| static const AVOption movie_options[]= { |
| {"format_name", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX }, |
| {"f", "set format name", OFFSET(format_name), AV_OPT_TYPE_STRING, {.str = 0}, CHAR_MIN, CHAR_MAX }, |
| {"stream_index", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX }, |
| {"si", "set stream index", OFFSET(stream_index), AV_OPT_TYPE_INT, {.dbl = -1}, -1, INT_MAX }, |
| {"seek_point", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 }, |
| {"sp", "set seekpoint (seconds)", OFFSET(seek_point_d), AV_OPT_TYPE_DOUBLE, {.dbl = 0}, 0, (INT64_MAX-1) / 1000000 }, |
| {NULL}, |
| }; |
| |
| static const char *movie_get_name(void *ctx) |
| { |
| return "movie"; |
| } |
| |
| static const AVClass movie_class = { |
| "MovieContext", |
| movie_get_name, |
| movie_options |
| }; |
| |
| static av_cold int movie_common_init(AVFilterContext *ctx, const char *args, void *opaque, |
| enum AVMediaType type) |
| { |
| MovieContext *movie = ctx->priv; |
| AVInputFormat *iformat = NULL; |
| AVCodec *codec; |
| int64_t timestamp; |
| int ret; |
| |
| movie->class = &movie_class; |
| av_opt_set_defaults(movie); |
| |
| if (args) |
| movie->file_name = av_get_token(&args, ":"); |
| if (!movie->file_name || !*movie->file_name) { |
| av_log(ctx, AV_LOG_ERROR, "No filename provided!\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if (*args++ == ':' && (ret = av_set_options_string(movie, args, "=", ":")) < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Error parsing options string: '%s'\n", args); |
| return ret; |
| } |
| |
| movie->seek_point = movie->seek_point_d * 1000000 + 0.5; |
| |
| av_register_all(); |
| |
| // 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 > INT64_MAX - movie->format_ctx->start_time) { |
| 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; |
| } |
| } |
| |
| /* select the media stream */ |
| if ((ret = av_find_best_stream(movie->format_ctx, type, |
| movie->stream_index, -1, NULL, 0)) < 0) { |
| av_log(ctx, AV_LOG_ERROR, "No %s stream with index '%d' found\n", |
| av_get_media_type_string(type), movie->stream_index); |
| return ret; |
| } |
| movie->stream_index = ret; |
| movie->codec_ctx = movie->format_ctx->streams[movie->stream_index]->codec; |
| |
| /* |
| * So now we've got a pointer to the so-called codec context for our video |
| * stream, but we still have to find the actual codec and open it. |
| */ |
| codec = avcodec_find_decoder(movie->codec_ctx->codec_id); |
| if (!codec) { |
| av_log(ctx, AV_LOG_ERROR, "Failed to find any codec\n"); |
| return AVERROR(EINVAL); |
| } |
| |
| if ((ret = avcodec_open2(movie->codec_ctx, codec, NULL)) < 0) { |
| av_log(ctx, AV_LOG_ERROR, "Failed to open codec\n"); |
| return ret; |
| } |
| |
| av_log(ctx, AV_LOG_INFO, "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); |
| |
| if (!(movie->frame = avcodec_alloc_frame()) ) { |
| av_log(ctx, AV_LOG_ERROR, "Failed to alloc frame\n"); |
| return AVERROR(ENOMEM); |
| } |
| |
| return 0; |
| } |
| |
| static av_cold void movie_common_uninit(AVFilterContext *ctx) |
| { |
| MovieContext *movie = ctx->priv; |
| |
| av_free(movie->file_name); |
| av_free(movie->format_name); |
| if (movie->codec_ctx) |
| avcodec_close(movie->codec_ctx); |
| if (movie->format_ctx) |
| avformat_close_input(&movie->format_ctx); |
| |
| avfilter_unref_buffer(movie->picref); |
| av_freep(&movie->frame); |
| |
| avfilter_unref_buffer(movie->samplesref); |
| } |
| |
| #if CONFIG_MOVIE_FILTER |
| |
| static av_cold int movie_init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| MovieContext *movie = ctx->priv; |
| int ret; |
| |
| if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_VIDEO)) < 0) |
| return ret; |
| |
| movie->w = movie->codec_ctx->width; |
| movie->h = movie->codec_ctx->height; |
| |
| return 0; |
| } |
| |
| static int movie_query_formats(AVFilterContext *ctx) |
| { |
| MovieContext *movie = ctx->priv; |
| enum PixelFormat pix_fmts[] = { movie->codec_ctx->pix_fmt, PIX_FMT_NONE }; |
| |
| avfilter_set_common_pixel_formats(ctx, avfilter_make_format_list(pix_fmts)); |
| return 0; |
| } |
| |
| static int movie_config_output_props(AVFilterLink *outlink) |
| { |
| MovieContext *movie = outlink->src->priv; |
| |
| outlink->w = movie->w; |
| outlink->h = movie->h; |
| outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base; |
| |
| return 0; |
| } |
| |
| static int movie_get_frame(AVFilterLink *outlink) |
| { |
| MovieContext *movie = outlink->src->priv; |
| AVPacket pkt; |
| int ret, frame_decoded; |
| AVStream *st = movie->format_ctx->streams[movie->stream_index]; |
| |
| if (movie->is_done == 1) |
| return 0; |
| |
| while ((ret = av_read_frame(movie->format_ctx, &pkt)) >= 0) { |
| // Is this a packet from the video stream? |
| if (pkt.stream_index == movie->stream_index) { |
| avcodec_decode_video2(movie->codec_ctx, movie->frame, &frame_decoded, &pkt); |
| |
| if (frame_decoded) { |
| /* FIXME: avoid the memcpy */ |
| movie->picref = avfilter_get_video_buffer(outlink, AV_PERM_WRITE | AV_PERM_PRESERVE | |
| AV_PERM_REUSE2, outlink->w, outlink->h); |
| av_image_copy(movie->picref->data, movie->picref->linesize, |
| (void*)movie->frame->data, movie->frame->linesize, |
| movie->picref->format, outlink->w, outlink->h); |
| avfilter_copy_frame_props(movie->picref, movie->frame); |
| |
| /* FIXME: use a PTS correction mechanism as that in |
| * ffplay.c when some API will be available for that */ |
| /* use pkt_dts if pkt_pts is not available */ |
| movie->picref->pts = movie->frame->pkt_pts == AV_NOPTS_VALUE ? |
| movie->frame->pkt_dts : movie->frame->pkt_pts; |
| |
| if (!movie->frame->sample_aspect_ratio.num) |
| movie->picref->video->sample_aspect_ratio = st->sample_aspect_ratio; |
| av_dlog(outlink->src, |
| "movie_get_frame(): file:'%s' pts:%"PRId64" time:%lf pos:%"PRId64" aspect:%d/%d\n", |
| movie->file_name, movie->picref->pts, |
| (double)movie->picref->pts * av_q2d(st->time_base), |
| movie->picref->pos, |
| movie->picref->video->sample_aspect_ratio.num, |
| movie->picref->video->sample_aspect_ratio.den); |
| // We got it. Free the packet since we are returning |
| av_free_packet(&pkt); |
| |
| return 0; |
| } |
| } |
| // Free the packet that was allocated by av_read_frame |
| av_free_packet(&pkt); |
| } |
| |
| // On multi-frame source we should stop the mixing process when |
| // the movie source does not have more frames |
| if (ret == AVERROR_EOF) |
| movie->is_done = 1; |
| return ret; |
| } |
| |
| static int movie_request_frame(AVFilterLink *outlink) |
| { |
| AVFilterBufferRef *outpicref; |
| MovieContext *movie = outlink->src->priv; |
| int ret; |
| |
| if (movie->is_done) |
| return AVERROR_EOF; |
| if ((ret = movie_get_frame(outlink)) < 0) |
| return ret; |
| |
| outpicref = avfilter_ref_buffer(movie->picref, ~0); |
| avfilter_start_frame(outlink, outpicref); |
| avfilter_draw_slice(outlink, 0, outlink->h, 1); |
| avfilter_end_frame(outlink); |
| avfilter_unref_buffer(movie->picref); |
| movie->picref = NULL; |
| |
| return 0; |
| } |
| |
| AVFilter avfilter_vsrc_movie = { |
| .name = "movie", |
| .description = NULL_IF_CONFIG_SMALL("Read from a movie source."), |
| .priv_size = sizeof(MovieContext), |
| .init = movie_init, |
| .uninit = movie_common_uninit, |
| .query_formats = movie_query_formats, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = NULL }}, |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_VIDEO, |
| .request_frame = movie_request_frame, |
| .config_props = movie_config_output_props, }, |
| { .name = NULL}}, |
| }; |
| |
| #endif /* CONFIG_MOVIE_FILTER */ |
| |
| #if CONFIG_AMOVIE_FILTER |
| |
| static av_cold int amovie_init(AVFilterContext *ctx, const char *args, void *opaque) |
| { |
| MovieContext *movie = ctx->priv; |
| int ret; |
| |
| if ((ret = movie_common_init(ctx, args, opaque, AVMEDIA_TYPE_AUDIO)) < 0) |
| return ret; |
| |
| movie->bps = av_get_bytes_per_sample(movie->codec_ctx->sample_fmt); |
| return 0; |
| } |
| |
| static int amovie_query_formats(AVFilterContext *ctx) |
| { |
| MovieContext *movie = ctx->priv; |
| AVCodecContext *c = movie->codec_ctx; |
| |
| enum AVSampleFormat sample_fmts[] = { c->sample_fmt, -1 }; |
| int packing_fmts[] = { AVFILTER_PACKED, -1 }; |
| int64_t chlayouts[] = { c->channel_layout ? c->channel_layout : |
| av_get_default_channel_layout(c->channels), -1 }; |
| |
| avfilter_set_common_sample_formats (ctx, avfilter_make_format_list(sample_fmts)); |
| avfilter_set_common_packing_formats(ctx, avfilter_make_format_list(packing_fmts)); |
| avfilter_set_common_channel_layouts(ctx, avfilter_make_format64_list(chlayouts)); |
| |
| return 0; |
| } |
| |
| static int amovie_config_output_props(AVFilterLink *outlink) |
| { |
| MovieContext *movie = outlink->src->priv; |
| AVCodecContext *c = movie->codec_ctx; |
| |
| outlink->sample_rate = c->sample_rate; |
| outlink->time_base = movie->format_ctx->streams[movie->stream_index]->time_base; |
| |
| return 0; |
| } |
| |
| static int amovie_get_samples(AVFilterLink *outlink) |
| { |
| MovieContext *movie = outlink->src->priv; |
| AVPacket pkt; |
| int ret, got_frame = 0; |
| |
| if (!movie->pkt.size && movie->is_done == 1) |
| return AVERROR_EOF; |
| |
| /* check for another frame, in case the previous one was completely consumed */ |
| if (!movie->pkt.size) { |
| while ((ret = av_read_frame(movie->format_ctx, &pkt)) >= 0) { |
| // Is this a packet from the selected stream? |
| if (pkt.stream_index != movie->stream_index) { |
| av_free_packet(&pkt); |
| continue; |
| } else { |
| movie->pkt0 = movie->pkt = pkt; |
| break; |
| } |
| } |
| |
| if (ret == AVERROR_EOF) { |
| movie->is_done = 1; |
| return ret; |
| } |
| } |
| |
| /* decode and update the movie pkt */ |
| avcodec_get_frame_defaults(movie->frame); |
| ret = avcodec_decode_audio4(movie->codec_ctx, movie->frame, &got_frame, &movie->pkt); |
| if (ret < 0) { |
| movie->pkt.size = 0; |
| return ret; |
| } |
| movie->pkt.data += ret; |
| movie->pkt.size -= ret; |
| |
| /* wrap the decoded data in a samplesref */ |
| if (got_frame) { |
| int nb_samples = movie->frame->nb_samples; |
| int data_size = |
| av_samples_get_buffer_size(NULL, movie->codec_ctx->channels, |
| nb_samples, movie->codec_ctx->sample_fmt, 1); |
| if (data_size < 0) |
| return data_size; |
| movie->samplesref = |
| avfilter_get_audio_buffer(outlink, AV_PERM_WRITE, nb_samples); |
| memcpy(movie->samplesref->data[0], movie->frame->data[0], data_size); |
| movie->samplesref->pts = movie->pkt.pts; |
| movie->samplesref->pos = movie->pkt.pos; |
| movie->samplesref->audio->sample_rate = movie->codec_ctx->sample_rate; |
| } |
| |
| // We got it. Free the packet since we are returning |
| if (movie->pkt.size <= 0) |
| av_free_packet(&movie->pkt0); |
| |
| return 0; |
| } |
| |
| static int amovie_request_frame(AVFilterLink *outlink) |
| { |
| MovieContext *movie = outlink->src->priv; |
| int ret; |
| |
| if (movie->is_done) |
| return AVERROR_EOF; |
| do { |
| if ((ret = amovie_get_samples(outlink)) < 0) |
| return ret; |
| } while (!movie->samplesref); |
| |
| avfilter_filter_samples(outlink, avfilter_ref_buffer(movie->samplesref, ~0)); |
| avfilter_unref_buffer(movie->samplesref); |
| movie->samplesref = NULL; |
| |
| return 0; |
| } |
| |
| AVFilter avfilter_asrc_amovie = { |
| .name = "amovie", |
| .description = NULL_IF_CONFIG_SMALL("Read audio from a movie source."), |
| .priv_size = sizeof(MovieContext), |
| .init = amovie_init, |
| .uninit = movie_common_uninit, |
| .query_formats = amovie_query_formats, |
| |
| .inputs = (const AVFilterPad[]) {{ .name = NULL }}, |
| .outputs = (const AVFilterPad[]) {{ .name = "default", |
| .type = AVMEDIA_TYPE_AUDIO, |
| .request_frame = amovie_request_frame, |
| .config_props = amovie_config_output_props, }, |
| { .name = NULL}}, |
| }; |
| |
| #endif /* CONFIG_AMOVIE_FILTER */ |
