[libav-devel] [PATCH 47/57] twinvq: implement new audio decoding API

[Justin Ruggles]

---
 libavcodec/twinvq.c |   28 +++++++++++++++++-----------
 1 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/libavcodec/twinvq.c b/libavcodec/twinvq.c
index a285156..78f36d7 100644
--- a/libavcodec/twinvq.c
+++ b/libavcodec/twinvq.c
@@ -174,6 +174,7 @@ static const ModeTab mode_44_48 = {
 
 typedef struct TwinContext {
     AVCodecContext *avctx;
+    AVFrame frame;
     DSPContext      dsp;
     FFTContext mdct_ctx[3];
 
@@ -811,16 +812,16 @@ static void read_and_decode_spectrum(TwinContext *tctx, 
GetBitContext *gb,
 }
 
 static int twin_decode_frame(AVCodecContext * avctx, void *data,
-                             int *data_size, AVPacket *avpkt)
+                             int *got_frame_ptr, AVPacket *avpkt)
 {
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
     TwinContext *tctx = avctx->priv_data;
     GetBitContext gb;
     const ModeTab *mtab = tctx->mtab;
-    float *out = data;
+    float *out;
     enum FrameType ftype;
-    int window_type, out_size;
+    int window_type, ret;
     static const enum FrameType wtype_to_ftype_table[] = {
         FT_LONG,   FT_LONG, FT_SHORT, FT_LONG,
         FT_MEDIUM, FT_LONG, FT_LONG,  FT_MEDIUM, FT_MEDIUM
@@ -832,12 +833,13 @@ static int twin_decode_frame(AVCodecContext * avctx, void 
*data,
         return AVERROR(EINVAL);
     }
 
-    out_size = mtab->size * avctx->channels *
-               av_get_bytes_per_sample(avctx->sample_fmt);
-    if (*data_size < out_size) {
-        av_log(avctx, AV_LOG_ERROR, "output buffer is too small\n");
-        return AVERROR(EINVAL);
+    /* get output buffer */
+    tctx->frame.nb_samples = mtab->size;
+    if ((ret = avctx->get_buffer(avctx, &tctx->frame)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
     }
+    out = (float *)tctx->frame.data[0];
 
     init_get_bits(&gb, buf, buf_size * 8);
     skip_bits(&gb, get_bits(&gb, 8));
@@ -857,11 +859,11 @@ static int twin_decode_frame(AVCodecContext * avctx, void 
*data,
     FFSWAP(float*, tctx->curr_frame, tctx->prev_frame);
 
     if (tctx->avctx->frame_number < 2) {
-        *data_size=0;
-        return buf_size;
+        tctx->frame.nb_samples = 0;
     }
 
-    *data_size = out_size;
+    *got_frame_ptr   = 1;
+    *(AVFrame *)data = tctx->frame;;
 
     return buf_size;
 }
@@ -1153,6 +1155,9 @@ static av_cold int twin_decode_init(AVCodecContext *avctx)
 
     memset_float(tctx->bark_hist[0][0], 0.1, FF_ARRAY_ELEMS(tctx->bark_hist));
 
+    avcodec_get_frame_defaults(&tctx->frame);
+    avctx->coded_frame = &tctx->frame;
+
     return 0;
 }
 
@@ -1164,5 +1169,6 @@ AVCodec ff_twinvq_decoder = {
     .init           = twin_decode_init,
     .close          = twin_decode_close,
     .decode         = twin_decode_frame,
+    .capabilities   = CODEC_CAP_DR1,
     .long_name      = NULL_IF_CONFIG_SMALL("VQF TwinVQ"),
 };
-- 
1.7.1

_______________________________________________
libav-devel mailing list
libav-devel@libav.org
https://lists.libav.org/mailman/listinfo/libav-devel