* gsm 06.10 decoder
* Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
static av_cold int gsm_init(AVCodecContext *avctx)
{
+ GSMContext *s = avctx->priv_data;
+
avctx->channels = 1;
if (!avctx->sample_rate)
avctx->sample_rate = 8000;
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 = 2 * avctx->frame_size;
+ int16_t *samples;
- if (*data_size < frame_bytes)
- return -1;
- *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:
if (res < 0)
return res;
}
- *data_size = frame_bytes;
+
+ *got_frame_ptr = 1;
+ *(AVFrame *)data = s->frame;
+
return avctx->block_align;
}
-AVCodec gsm_decoder = {
- "gsm",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_GSM,
- sizeof(GSMContext),
- gsm_init,
- NULL,
- NULL,
- gsm_decode_frame,
+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,
+ .id = CODEC_ID_GSM,
+ .priv_data_size = sizeof(GSMContext),
+ .init = gsm_init,
+ .decode = gsm_decode_frame,
+ .flush = gsm_flush,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("GSM"),
};
-AVCodec gsm_ms_decoder = {
- "gsm_ms",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_GSM_MS,
- sizeof(GSMContext),
- gsm_init,
- NULL,
- NULL,
- gsm_decode_frame,
+AVCodec ff_gsm_ms_decoder = {
+ .name = "gsm_ms",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_GSM_MS,
+ .priv_data_size = sizeof(GSMContext),
+ .init = gsm_init,
+ .decode = gsm_decode_frame,
+ .flush = gsm_flush,
+ .capabilities = CODEC_CAP_DR1,
.long_name = NULL_IF_CONFIG_SMALL("GSM Microsoft variant"),
};