* GSM decoder
*/
+#include "libavutil/channel_layout.h"
#include "avcodec.h"
#include "get_bits.h"
+#include "internal.h"
#include "msgsmdec.h"
#include "gsmdec_template.c"
static av_cold int gsm_init(AVCodecContext *avctx)
{
- avctx->channels = 1;
+ avctx->channels = 1;
+ avctx->channel_layout = AV_CH_LAYOUT_MONO;
if (!avctx->sample_rate)
avctx->sample_rate = 8000;
- avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
switch (avctx->codec_id) {
- case CODEC_ID_GSM:
+ case AV_CODEC_ID_GSM:
avctx->frame_size = GSM_FRAME_SIZE;
avctx->block_align = GSM_BLOCK_SIZE;
break;
- case CODEC_ID_GSM_MS:
+ case AV_CODEC_ID_GSM_MS:
avctx->frame_size = 2 * GSM_FRAME_SIZE;
- avctx->block_align = GSM_MS_BLOCK_SIZE;
+ if (!avctx->block_align)
+ avctx->block_align = GSM_MS_BLOCK_SIZE;
+ else
+ if (avctx->block_align < MSN_MIN_BLOCK_SIZE ||
+ avctx->block_align > GSM_MS_BLOCK_SIZE ||
+ (avctx->block_align - MSN_MIN_BLOCK_SIZE) % 3) {
+ av_log(avctx, AV_LOG_ERROR, "Invalid block alignment %d\n",
+ avctx->block_align);
+ return AVERROR_INVALIDDATA;
+ }
}
return 0;
}
static int gsm_decode_frame(AVCodecContext *avctx, void *data,
- int *data_size, AVPacket *avpkt)
+ int *got_frame_ptr, AVPacket *avpkt)
{
+ AVFrame *frame = 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 */
+ frame->nb_samples = avctx->frame_size;
+ if ((res = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return res;
+ }
+ samples = (int16_t *)frame->data[0];
switch (avctx->codec_id) {
- case CODEC_ID_GSM:
+ case AV_CODEC_ID_GSM:
init_get_bits(&gb, buf, buf_size * 8);
if (get_bits(&gb, 4) != 0xd)
av_log(avctx, AV_LOG_WARNING, "Missing GSM magic!\n");
- res = gsm_decode_block(avctx, samples, &gb);
+ res = gsm_decode_block(avctx, samples, &gb, GSM_13000);
if (res < 0)
return res;
break;
- case CODEC_ID_GSM_MS:
- res = ff_msgsm_decode_block(avctx, samples, buf);
+ case AV_CODEC_ID_GSM_MS:
+ res = ff_msgsm_decode_block(avctx, samples, buf,
+ (GSM_MS_BLOCK_SIZE - avctx->block_align) / 3);
if (res < 0)
return res;
}
- *data_size = frame_bytes;
+
+ *got_frame_ptr = 1;
+
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",
+ .long_name = NULL_IF_CONFIG_SMALL("GSM"),
.type = AVMEDIA_TYPE_AUDIO,
- .id = CODEC_ID_GSM,
+ .id = AV_CODEC_ID_GSM,
.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,
};
AVCodec ff_gsm_ms_decoder = {
.name = "gsm_ms",
+ .long_name = NULL_IF_CONFIG_SMALL("GSM Microsoft variant"),
.type = AVMEDIA_TYPE_AUDIO,
- .id = CODEC_ID_GSM_MS,
+ .id = AV_CODEC_ID_GSM_MS,
.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,
};