MS Screen 1 decoder

[ffmpeg] / libavcodec / gsmdec.c

diff --git a/libavcodec/gsmdec.c b/libavcodec/gsmdec.c
index 26340c2792666a1a51ea73700350478171d53a74..4d5b4763e3ee3805047c9791541073f59905bb66 100644 (file)
--- a/libavcodec/gsmdec.c
+++ b/libavcodec/gsmdec.c
@@ -32,6 +32,8 @@
 
 static av_cold int gsm_init(AVCodecContext *avctx)
 {
+    GSMContext *s = avctx->priv_data;
+
     avctx->channels = 1;
     if (!avctx->sample_rate)
         avctx->sample_rate = 8000;
@@ -47,27 +49,34 @@ static av_cold int gsm_init(AVCodecContext *avctx)
         avctx->block_align = GSM_MS_BLOCK_SIZE;
     }
 
+    avcodec_get_frame_defaults(&s->frame);
+    avctx->coded_frame = &s->frame;
+
     return 0;
 }
 
 static int gsm_decode_frame(AVCodecContext *avctx, void *data,
-                            int *data_size, AVPacket *avpkt)
+                            int *got_frame_ptr, AVPacket *avpkt)
 {
+    GSMContext *s = avctx->priv_data;
     int res;
     GetBitContext gb;
     const uint8_t *buf = avpkt->data;
     int buf_size = avpkt->size;
-    int16_t *samples = data;
-    int frame_bytes = avctx->frame_size *
-                      av_get_bytes_per_sample(avctx->sample_fmt);
+    int16_t *samples;
 
-    if (*data_size < frame_bytes) {
-        av_log(avctx, AV_LOG_ERROR, "Output buffer is too small\n");
-        return AVERROR(EINVAL);
-    }
-    *data_size = 0;
-    if(buf_size < avctx->block_align)
+    if (buf_size < avctx->block_align) {
+        av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
         return AVERROR_INVALIDDATA;
+    }
+
+    /* get output buffer */
+    s->frame.nb_samples = avctx->frame_size;
+    if ((res = avctx->get_buffer(avctx, &s->frame)) < 0) {
+        av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+        return res;
+    }
+    samples = (int16_t *)s->frame.data[0];
 
     switch (avctx->codec_id) {
     case CODEC_ID_GSM:
@@ -83,10 +92,19 @@ static int gsm_decode_frame(AVCodecContext *avctx, void *data,
         if (res < 0)
             return res;
     }
-    *data_size = frame_bytes;
+
+    *got_frame_ptr   = 1;
+    *(AVFrame *)data = s->frame;
+
     return avctx->block_align;
 }
 
+static void gsm_flush(AVCodecContext *avctx)
+{
+    GSMContext *s = avctx->priv_data;
+    memset(s, 0, sizeof(*s));
+}
+
 AVCodec ff_gsm_decoder = {
     .name           = "gsm",
     .type           = AVMEDIA_TYPE_AUDIO,
@@ -94,7 +112,9 @@ AVCodec ff_gsm_decoder = {
     .priv_data_size = sizeof(GSMContext),
     .init           = gsm_init,
     .decode         = gsm_decode_frame,
-    .long_name = NULL_IF_CONFIG_SMALL("GSM"),
+    .flush          = gsm_flush,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("GSM"),
 };
 
 AVCodec ff_gsm_ms_decoder = {
@@ -104,5 +124,7 @@ AVCodec ff_gsm_ms_decoder = {
     .priv_data_size = sizeof(GSMContext),
     .init           = gsm_init,
     .decode         = gsm_decode_frame,
-    .long_name = NULL_IF_CONFIG_SMALL("GSM Microsoft variant"),
+    .flush          = gsm_flush,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("GSM Microsoft variant"),
 };