From 0eea212943544d40f99b05571aa7159d78667154 Mon Sep 17 00:00:00 2001
From: Justin Ruggles <justin.ruggles@gmail.com>
Date: Tue, 6 Sep 2011 12:17:45 -0400
Subject: Add avcodec_decode_audio4().

Deprecate avcodec_decode_audio3().
Implement audio support in avcodec_default_get_buffer().
Implement the new audio decoder API in all audio decoders.
---
 libavcodec/twinvq.c | 36 +++++++++++++++++++++++++-----------
 1 file changed, 25 insertions(+), 11 deletions(-)

(limited to 'libavcodec/twinvq.c')

diff --git a/libavcodec/twinvq.c b/libavcodec/twinvq.c
index a2851562ee..22be07a5b5 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];
 
@@ -195,6 +196,7 @@ typedef struct TwinContext {
     float *curr_frame;               ///< non-interleaved output
     float *prev_frame;               ///< non-interleaved previous frame
     int last_block_pos[2];
+    int discarded_packets;
 
     float *cos_tabs[3];
 
@@ -676,6 +678,9 @@ static void imdct_output(TwinContext *tctx, enum FrameType ftype, int wtype,
                          i);
     }
 
+    if (!out)
+        return;
+
     size2 = tctx->last_block_pos[0];
     size1 = mtab->size - size2;
     if (tctx->avctx->channels == 2) {
@@ -811,16 +816,16 @@ 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 = NULL;
     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
@@ -832,11 +837,14 @@ 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 */
+    if (tctx->discarded_packets >= 2) {
+        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);
@@ -856,12 +864,14 @@ 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;
+    if (tctx->discarded_packets < 2) {
+        tctx->discarded_packets++;
+        *got_frame_ptr = 0;
         return buf_size;
     }
 
-    *data_size = out_size;
+    *got_frame_ptr   = 1;
+    *(AVFrame *)data = tctx->frame;;
 
     return buf_size;
 }
@@ -1153,6 +1163,9 @@ 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 +1177,6 @@ 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"),
 };
-- 
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