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/alsdec.c | 43 ++++++++++++++++++++++++-------------------
 1 file changed, 24 insertions(+), 19 deletions(-)

(limited to 'libavcodec/alsdec.c')

diff --git a/libavcodec/alsdec.c b/libavcodec/alsdec.c
index e7a0de24b1..71495803a3 100644
--- a/libavcodec/alsdec.c
+++ b/libavcodec/alsdec.c
@@ -191,6 +191,7 @@ typedef struct {
 
 typedef struct {
     AVCodecContext *avctx;
+    AVFrame frame;
     ALSSpecificConfig sconf;
     GetBitContext gb;
     DSPContext dsp;
@@ -1415,15 +1416,14 @@ static int read_frame_data(ALSDecContext *ctx, unsigned int ra_frame)
 
 /** Decode an ALS frame.
  */
-static int decode_frame(AVCodecContext *avctx,
-                        void *data, int *data_size,
+static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr,
                         AVPacket *avpkt)
 {
     ALSDecContext *ctx       = avctx->priv_data;
     ALSSpecificConfig *sconf = &ctx->sconf;
     const uint8_t *buffer    = avpkt->data;
     int buffer_size          = avpkt->size;
-    int invalid_frame, size;
+    int invalid_frame, ret;
     unsigned int c, sample, ra_frame, bytes_read, shift;
 
     init_get_bits(&ctx->gb, buffer, buffer_size * 8);
@@ -1448,21 +1448,17 @@ static int decode_frame(AVCodecContext *avctx,
 
     ctx->frame_id++;
 
-    // check for size of decoded data
-    size = ctx->cur_frame_length * avctx->channels *
-           av_get_bytes_per_sample(avctx->sample_fmt);
-
-    if (size > *data_size) {
-        av_log(avctx, AV_LOG_ERROR, "Decoded data exceeds buffer size.\n");
-        return -1;
+    /* get output buffer */
+    ctx->frame.nb_samples = ctx->cur_frame_length;
+    if ((ret = avctx->get_buffer(avctx, &ctx->frame)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return ret;
     }
 
-    *data_size = size;
-
     // transform decoded frame into output format
     #define INTERLEAVE_OUTPUT(bps)                                 \
     {                                                              \
-        int##bps##_t *dest = (int##bps##_t*) data;                 \
+        int##bps##_t *dest = (int##bps##_t*)ctx->frame.data[0];    \
         shift = bps - ctx->avctx->bits_per_raw_sample;             \
         for (sample = 0; sample < ctx->cur_frame_length; sample++) \
             for (c = 0; c < avctx->channels; c++)                  \
@@ -1480,7 +1476,7 @@ static int decode_frame(AVCodecContext *avctx,
         int swap = HAVE_BIGENDIAN != sconf->msb_first;
 
         if (ctx->avctx->bits_per_raw_sample == 24) {
-            int32_t *src = data;
+            int32_t *src = (int32_t *)ctx->frame.data[0];
 
             for (sample = 0;
                  sample < ctx->cur_frame_length * avctx->channels;
@@ -1501,22 +1497,25 @@ static int decode_frame(AVCodecContext *avctx,
 
             if (swap) {
                 if (ctx->avctx->bits_per_raw_sample <= 16) {
-                    int16_t *src  = (int16_t*) data;
+                    int16_t *src  = (int16_t*) ctx->frame.data[0];
                     int16_t *dest = (int16_t*) ctx->crc_buffer;
                     for (sample = 0;
                          sample < ctx->cur_frame_length * avctx->channels;
                          sample++)
                         *dest++ = av_bswap16(src[sample]);
                 } else {
-                    ctx->dsp.bswap_buf((uint32_t*)ctx->crc_buffer, data,
+                    ctx->dsp.bswap_buf((uint32_t*)ctx->crc_buffer,
+                                       (uint32_t *)ctx->frame.data[0],
                                        ctx->cur_frame_length * avctx->channels);
                 }
                 crc_source = ctx->crc_buffer;
             } else {
-                crc_source = data;
+                crc_source = ctx->frame.data[0];
             }
 
-            ctx->crc = av_crc(ctx->crc_table, ctx->crc, crc_source, size);
+            ctx->crc = av_crc(ctx->crc_table, ctx->crc, crc_source,
+                              ctx->cur_frame_length * avctx->channels *
+                              av_get_bytes_per_sample(avctx->sample_fmt));
         }
 
 
@@ -1527,6 +1526,9 @@ static int decode_frame(AVCodecContext *avctx,
         }
     }
 
+    *got_frame_ptr   = 1;
+    *(AVFrame *)data = ctx->frame;
+
 
     bytes_read = invalid_frame ? buffer_size :
                                  (get_bits_count(&ctx->gb) + 7) >> 3;
@@ -1724,6 +1726,9 @@ static av_cold int decode_init(AVCodecContext *avctx)
 
     dsputil_init(&ctx->dsp, avctx);
 
+    avcodec_get_frame_defaults(&ctx->frame);
+    avctx->coded_frame = &ctx->frame;
+
     return 0;
 }
 
@@ -1747,7 +1752,7 @@ AVCodec ff_als_decoder = {
     .close          = decode_end,
     .decode         = decode_frame,
     .flush = flush,
-    .capabilities = CODEC_CAP_SUBFRAMES,
+    .capabilities = CODEC_CAP_SUBFRAMES | CODEC_CAP_DR1,
     .long_name = NULL_IF_CONFIG_SMALL("MPEG-4 Audio Lossless Coding (ALS)"),
 };
 
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