From 3839580b71345ec7a8245dc5faa562eb9903cb22 Mon Sep 17 00:00:00 2001
From: Matthieu Bouron <matthieu.bouron@gmail.com>
Date: Sat, 10 Jun 2017 00:41:07 +0200
Subject: [PATCH] lavc/mediacodecdec: switch to the new generic filtering
 mechanism

---
 libavcodec/mediacodecdec.c | 74 +++++++-------------------------------
 1 file changed, 13 insertions(+), 61 deletions(-)

diff --git a/libavcodec/mediacodecdec.c b/libavcodec/mediacodecdec.c
index 5bdeb6c1d7..6962ce2474 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);
@@ -502,11 +475,9 @@ 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 */
-        if (s->filtered_pkt.size <= 0) {
-            AVPacket input_pkt = { 0 };
-
-            av_packet_unref(&s->filtered_pkt);
+        /* prepare the input data */
+        if (s->buffered_pkt.size <= 0) {
+            av_packet_unref(&s->buffered_pkt);
 
             /* no more data */
             if (av_fifo_size(s->fifo) < sizeof(AVPacket)) {
@@ -514,38 +485,17 @@ 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(s->buffered_pkt), NULL);
         }
 
-        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:
+
     return avpkt->size;
 }
 
@@ -560,7 +510,7 @@ 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 +528,7 @@ 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 +545,7 @@ 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