[FFmpeg-devel] [PATCH] lavc/mediacodecdec: switch to the new generic filtering mechanism
Matthieu Bouron
matthieu.bouron at gmail.com
Sat Jun 10 02:38:20 EEST 2017
On Fri, Jun 09, 2017 at 08:18:25PM -0300, James Almer wrote:
> On 6/9/2017 7:53 PM, Matthieu Bouron wrote:
> > ---
> > libavcodec/mediacodecdec.c | 70 ++++++++--------------------------------------
> > 1 file changed, 12 insertions(+), 58 deletions(-)
> >
> > diff --git a/libavcodec/mediacodecdec.c b/libavcodec/mediacodecdec.c
> > index 5bdeb6c1d7..0c77a78aa9 100644
> > --- a/libavcodec/mediacodecdec.c
> > +++ b/libavcodec/mediacodecdec.c
> > @@ -41,11 +41,9 @@ typedef struct MediaCodecH264DecContext {
> >
> > MediaCodecDecContext *ctx;
> >
> > - AVBSFContext *bsf;
> > -
> > AVFifoBuffer *fifo;
> >
> > - AVPacket filtered_pkt;
> > + AVPacket buffered_pkt;
> >
> > } MediaCodecH264DecContext;
> >
> > @@ -58,8 +56,7 @@ static av_cold int mediacodec_decode_close(AVCodecContext *avctx)
> >
> > av_fifo_free(s->fifo);
> >
> > - av_bsf_free(&s->bsf);
> > - av_packet_unref(&s->filtered_pkt);
> > + av_packet_unref(&s->buffered_pkt);
> >
> > return 0;
> > }
> > @@ -312,9 +309,6 @@ static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
> >
> > const char *codec_mime = NULL;
> >
> > - const char *bsf_name = NULL;
> > - const AVBitStreamFilter *bsf = NULL;
> > -
> > FFAMediaFormat *format = NULL;
> > MediaCodecH264DecContext *s = avctx->priv_data;
> >
> > @@ -329,7 +323,6 @@ static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
> > #if CONFIG_H264_MEDIACODEC_DECODER
> > case AV_CODEC_ID_H264:
> > codec_mime = "video/avc";
> > - bsf_name = "h264_mp4toannexb";
> >
> > ret = h264_set_extradata(avctx, format);
> > if (ret < 0)
> > @@ -339,7 +332,6 @@ static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
> > #if CONFIG_HEVC_MEDIACODEC_DECODER
> > case AV_CODEC_ID_HEVC:
> > codec_mime = "video/hevc";
> > - bsf_name = "hevc_mp4toannexb";
> >
> > ret = hevc_set_extradata(avctx, format);
> > if (ret < 0)
> > @@ -410,25 +402,6 @@ static av_cold int mediacodec_decode_init(AVCodecContext *avctx)
> > goto done;
> > }
> >
> > - if (bsf_name) {
> > - bsf = av_bsf_get_by_name(bsf_name);
> > - if(!bsf) {
> > - ret = AVERROR_BSF_NOT_FOUND;
> > - goto done;
> > - }
> > -
> > - if ((ret = av_bsf_alloc(bsf, &s->bsf))) {
> > - goto done;
> > - }
> > -
> > - if (((ret = avcodec_parameters_from_context(s->bsf->par_in, avctx)) < 0) ||
> > - ((ret = av_bsf_init(s->bsf)) < 0)) {
> > - goto done;
> > - }
> > - }
> > -
> > - av_init_packet(&s->filtered_pkt);
> > -
> > done:
> > if (format) {
> > ff_AMediaFormat_delete(format);
> > @@ -503,10 +476,10 @@ static int mediacodec_decode_frame(AVCodecContext *avctx, void *data,
> > /* process buffered data */
> > while (!*got_frame) {
> > /* prepare the input data -- convert to Annex B if needed */
>
> The second part of this comment can be removed.
Fixed.
>
> > - if (s->filtered_pkt.size <= 0) {
> > - AVPacket input_pkt = { 0 };
> > + if (s->buffered_pkt.size <= 0) {
> > + AVPacket input_pkt;
> >
> > - av_packet_unref(&s->filtered_pkt);
> > + av_packet_unref(&s->buffered_pkt);
> >
> > /* no more data */
> > if (av_fifo_size(s->fifo) < sizeof(AVPacket)) {
> > @@ -514,36 +487,15 @@ static int mediacodec_decode_frame(AVCodecContext *avctx, void *data,
> > ff_mediacodec_dec_decode(avctx, s->ctx, frame, got_frame, avpkt);
> > }
> >
> > - av_fifo_generic_read(s->fifo, &input_pkt, sizeof(input_pkt), NULL);
> > -
> > - if (s->bsf) {
> > - ret = av_bsf_send_packet(s->bsf, &input_pkt);
> > - if (ret < 0) {
> > - return ret;
> > - }
> > -
> > - ret = av_bsf_receive_packet(s->bsf, &s->filtered_pkt);
> > - if (ret == AVERROR(EAGAIN)) {
> > - goto done;
> > - }
> > - } else {
> > - av_packet_move_ref(&s->filtered_pkt, &input_pkt);
> > - }
> > -
> > - /* {h264,hevc}_mp4toannexb are used here and do not require flushing */
> > - av_assert0(ret != AVERROR_EOF);
> > -
> > - if (ret < 0) {
> > - return ret;
> > - }
> > + av_fifo_generic_read(s->fifo, &s->buffered_pkt, sizeof(input_pkt), NULL);
>
> input_pkt is unused aside from this, so why not just do
> sizeof(s->buffered_pkt) instead and remove input_pkt altogether?
Fixed. I removed input_pkt as it was a left-over of the previous code.
>
> > }
> >
> > - ret = mediacodec_process_data(avctx, frame, got_frame, &s->filtered_pkt);
> > + ret = mediacodec_process_data(avctx, frame, got_frame, &s->buffered_pkt);
> > if (ret < 0)
> > return ret;
> >
> > - s->filtered_pkt.size -= ret;
> > - s->filtered_pkt.data += ret;
> > + s->buffered_pkt.size -= ret;
> > + s->buffered_pkt.data += ret;
> > }
> > done:
I also removed the above done label, which is now unused.
> > return avpkt->size;
> > @@ -560,7 +512,7 @@ static void mediacodec_decode_flush(AVCodecContext *avctx)
> > }
> > av_fifo_reset(s->fifo);
> >
> > - av_packet_unref(&s->filtered_pkt);
> > + av_packet_unref(&s->buffered_pkt);
> >
> > ff_mediacodec_dec_flush(avctx, s->ctx);
> > }
> > @@ -578,6 +530,7 @@ AVCodec ff_h264_mediacodec_decoder = {
> > .close = mediacodec_decode_close,
> > .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AVOID_PROBING,
> > .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
> > + .bsfs = "h264_mp4toannexb",
> > };
> > #endif
> >
> > @@ -594,6 +547,7 @@ AVCodec ff_hevc_mediacodec_decoder = {
> > .close = mediacodec_decode_close,
> > .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_AVOID_PROBING,
> > .caps_internal = FF_CODEC_CAP_SETS_PKT_DTS,
> > + .bsfs = "hevc_mp4toannexb",
> > };
> > #endif
>
> LGTM otherwise if it works (Can't test).
Thanks for the review.
I've done some basic testing and it works but I'll wait a day or two
before pushing it. The updated patch is attached.
[...]
--
Matthieu B.
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