/* video-only fields */
int w, h;
AVFilterBufferRef *picref;
+
+ /* audio-only fields */
+ void *samples_buf;
+ int samples_buf_size;
+ int bps; ///< bytes per sample
+ AVPacket pkt, pkt0;
+ AVFilterBufferRef *samplesref;
} MovieContext;
#define OFFSET(x) offsetof(MovieContext, x)
int ret;
movie->class = &movie_class;
- av_opt_set_defaults2(movie, 0, 0);
+ av_opt_set_defaults(movie);
if (args)
movie->file_name = av_get_token(&args, ":");
avfilter_unref_buffer(movie->picref);
av_freep(&movie->frame);
+
+ avfilter_unref_buffer(movie->samplesref);
+ av_freep(&movie->samples_buf);
}
+#if CONFIG_MOVIE_FILTER
+
static av_cold int movie_init(AVFilterContext *ctx, const char *args, void *opaque)
{
MovieContext *movie = ctx->priv;
.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, -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, samples_size, decoded_data_size;
+
+ 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;
+ }
+ }
+
+ /* reallocate the buffer for the decoded samples, if necessary */
+ samples_size =
+ FFMAX(movie->pkt.size*sizeof(movie->bps), AVCODEC_MAX_AUDIO_FRAME_SIZE);
+ if (samples_size > movie->samples_buf_size) {
+ movie->samples_buf = av_fast_realloc(movie->samples_buf,
+ &movie->samples_buf_size, samples_size);
+ if (!movie->samples_buf)
+ return AVERROR(ENOMEM);
+ }
+ decoded_data_size = movie->samples_buf_size;
+
+ /* decode and update the movie pkt */
+ ret = avcodec_decode_audio3(movie->codec_ctx, movie->samples_buf,
+ &decoded_data_size, &movie->pkt);
+ if (ret < 0)
+ return ret;
+ movie->pkt.data += ret;
+ movie->pkt.size -= ret;
+
+ /* wrap the decoded data in a samplesref */
+ if (decoded_data_size > 0) {
+ int nb_samples = decoded_data_size / movie->bps / movie->codec_ctx->channels;
+ movie->samplesref =
+ avfilter_get_audio_buffer(outlink, AV_PERM_WRITE, nb_samples);
+ memcpy(movie->samplesref->data[0], movie->samples_buf, decoded_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;
+ if ((ret = amovie_get_samples(outlink)) < 0)
+ return ret;
+
+ 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 = (AVFilterPad[]) {{ .name = NULL }},
+ .outputs = (AVFilterPad[]) {{ .name = "default",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .request_frame = amovie_request_frame,
+ .config_props = amovie_config_output_props, },
+ { .name = NULL}},
+};
+
+#endif /* CONFIG_AMOVIE_FILTER */
projects / ffmpeg / blobdiff