/*
* AMR Audio decoder stub
- * Copyright (c) 2003 the ffmpeg project
+ * Copyright (c) 2003 The FFmpeg project
*
* This file is part of Libav.
*
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+#include <inttypes.h>
+
+#include "libavutil/avstring.h"
+#include "libavutil/channel_layout.h"
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
#include "avcodec.h"
+#include "audio_frame_queue.h"
+#include "internal.h"
-static void amr_decode_fix_avctx(AVCodecContext *avctx)
+static int amr_decode_fix_avctx(AVCodecContext *avctx)
{
- const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
+ const int is_amr_wb = 1 + (avctx->codec_id == AV_CODEC_ID_AMR_WB);
- if (!avctx->sample_rate)
- avctx->sample_rate = 8000 * is_amr_wb;
+ avctx->sample_rate = 8000 * is_amr_wb;
- if (!avctx->channels)
- avctx->channels = 1;
+ if (avctx->channels > 1) {
+ avpriv_report_missing_feature(avctx, "multi-channel AMR");
+ return AVERROR_PATCHWELCOME;
+ }
- avctx->frame_size = 160 * is_amr_wb;
- avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ avctx->channels = 1;
+ avctx->channel_layout = AV_CH_LAYOUT_MONO;
+ avctx->sample_fmt = AV_SAMPLE_FMT_S16;
+ return 0;
}
#if CONFIG_LIBOPENCORE_AMRNB
#include <opencore-amrnb/interf_dec.h>
#include <opencore-amrnb/interf_enc.h>
-static const char nb_bitrate_unsupported[] =
- "bitrate not supported: use one of 4.75k, 5.15k, 5.9k, 6.7k, 7.4k, 7.95k, 10.2k or 12.2k\n";
-
-/* Common code for fixed and float version*/
-typedef struct AMR_bitrates {
- int rate;
- enum Mode mode;
-} AMR_bitrates;
-
-/* Match desired bitrate */
-static int getBitrateMode(int bitrate)
-{
- /* make the correspondance between bitrate and mode */
- static const AMR_bitrates rates[] = {{ 4750, MR475},
- { 5150, MR515},
- { 5900, MR59},
- { 6700, MR67},
- { 7400, MR74},
- { 7950, MR795},
- {10200, MR102},
- {12200, MR122}, };
- int i;
-
- for (i = 0; i < 8; i++)
- if (rates[i].rate == bitrate)
- return rates[i].mode;
- /* no bitrate matching, return an error */
- return -1;
-}
-
typedef struct AMRContext {
- int frameCount;
- void *decState;
- void *enstate;
+ AVClass *av_class;
+ void *dec_state;
+ void *enc_state;
int enc_bitrate;
+ int enc_mode;
+ int enc_dtx;
+ int enc_last_frame;
+ AudioFrameQueue afq;
} AMRContext;
+#if CONFIG_LIBOPENCORE_AMRNB_DECODER
static av_cold int amr_nb_decode_init(AVCodecContext *avctx)
{
- AMRContext *s = avctx->priv_data;
+ AMRContext *s = avctx->priv_data;
+ int ret;
+
+ if ((ret = amr_decode_fix_avctx(avctx)) < 0)
+ return ret;
- s->frameCount = 0;
- s->decState = Decoder_Interface_init();
- if (!s->decState) {
+ s->dec_state = Decoder_Interface_init();
+ if (!s->dec_state) {
av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\n");
return -1;
}
- amr_decode_fix_avctx(avctx);
-
- if (avctx->channels > 1) {
- av_log(avctx, AV_LOG_ERROR, "amr_nb: multichannel decoding not supported\n");
- return AVERROR(ENOSYS);
- }
-
return 0;
}
{
AMRContext *s = avctx->priv_data;
- Decoder_Interface_exit(s->decState);
+ Decoder_Interface_exit(s->dec_state);
+
return 0;
}
static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,
- int *data_size, AVPacket *avpkt)
+ int *got_frame_ptr, AVPacket *avpkt)
{
+ AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
- AMRContext *s = avctx->priv_data;
+ AMRContext *s = avctx->priv_data;
static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
enum Mode dec_mode;
- int packet_size;
+ int packet_size, ret;
- /* av_log(NULL, AV_LOG_DEBUG, "amr_decode_frame buf=%p buf_size=%d frameCount=%d!!\n",
- buf, buf_size, s->frameCount); */
+ ff_dlog(avctx, "amr_decode_frame buf=%p buf_size=%d frame_count=%d!!\n",
+ buf, buf_size, avctx->frame_number);
+
+ /* get output buffer */
+ frame->nb_samples = 160;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
- dec_mode = (buf[0] >> 3) & 0x000F;
+ dec_mode = (buf[0] >> 3) & 0x000F;
packet_size = block_size[dec_mode] + 1;
if (packet_size > buf_size) {
- av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
+ av_log(avctx, AV_LOG_ERROR, "AMR frame too short (%d, should be %d)\n",
buf_size, packet_size);
return AVERROR_INVALIDDATA;
}
- s->frameCount++;
- /* av_log(NULL, AV_LOG_DEBUG, "packet_size=%d buf= 0x%X %X %X %X\n",
- packet_size, buf[0], buf[1], buf[2], buf[3]); */
+ ff_dlog(avctx, "packet_size=%d buf= 0x%"PRIx8" %"PRIx8" %"PRIx8" %"PRIx8"\n",
+ packet_size, buf[0], buf[1], buf[2], buf[3]);
/* call decoder */
- Decoder_Interface_Decode(s->decState, buf, data, 0);
- *data_size = 160 * 2;
+ Decoder_Interface_Decode(s->dec_state, buf, (short *)frame->data[0], 0);
+
+ *got_frame_ptr = 1;
return packet_size;
}
AVCodec ff_libopencore_amrnb_decoder = {
- "libopencore_amrnb",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_AMR_NB,
- sizeof(AMRContext),
- amr_nb_decode_init,
- NULL,
- amr_nb_decode_close,
- amr_nb_decode_frame,
- .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
+ .name = "libopencore_amrnb",
+ .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_AMR_NB,
+ .priv_data_size = sizeof(AMRContext),
+ .init = amr_nb_decode_init,
+ .close = amr_nb_decode_close,
+ .decode = amr_nb_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
+};
+#endif /* CONFIG_LIBOPENCORE_AMRNB_DECODER */
+
+#if CONFIG_LIBOPENCORE_AMRNB_ENCODER
+/* Common code for fixed and float version*/
+typedef struct AMR_bitrates {
+ int rate;
+ enum Mode mode;
+} AMR_bitrates;
+
+/* Match desired bitrate */
+static int get_bitrate_mode(int bitrate, void *log_ctx)
+{
+ /* make the correspondence between bitrate and mode */
+ static const AMR_bitrates rates[] = {
+ { 4750, MR475 }, { 5150, MR515 }, { 5900, MR59 }, { 6700, MR67 },
+ { 7400, MR74 }, { 7950, MR795 }, { 10200, MR102 }, { 12200, MR122 }
+ };
+ int i, best = -1, min_diff = 0;
+ char log_buf[200];
+
+ for (i = 0; i < 8; i++) {
+ if (rates[i].rate == bitrate)
+ return rates[i].mode;
+ if (best < 0 || abs(rates[i].rate - bitrate) < min_diff) {
+ best = i;
+ min_diff = abs(rates[i].rate - bitrate);
+ }
+ }
+ /* no bitrate matching exactly, log a warning */
+ snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
+ for (i = 0; i < 8; i++)
+ av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i].rate / 1000.f);
+ av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best].rate / 1000.f);
+ av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
+
+ return best;
+}
+
+static const AVOption options[] = {
+ { "dtx", "Allow DTX (generate comfort noise)", offsetof(AMRContext, enc_dtx), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
+ { NULL }
+};
+
+static const AVClass class = {
+ "libopencore_amrnb", av_default_item_name, options, LIBAVUTIL_VERSION_INT
};
static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
{
AMRContext *s = avctx->priv_data;
- s->frameCount = 0;
-
if (avctx->sample_rate != 8000) {
av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
return AVERROR(ENOSYS);
}
avctx->frame_size = 160;
- avctx->coded_frame = avcodec_alloc_frame();
+ avctx->initial_padding = 50;
+ ff_af_queue_init(avctx, &s->afq);
- s->enstate=Encoder_Interface_init(0);
- if (!s->enstate) {
+ s->enc_state = Encoder_Interface_init(s->enc_dtx);
+ if (!s->enc_state) {
av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
return -1;
}
- if ((s->enc_bitrate = getBitrateMode(avctx->bit_rate)) < 0) {
- av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
- return AVERROR(ENOSYS);
- }
+ s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
+ s->enc_bitrate = avctx->bit_rate;
return 0;
}
{
AMRContext *s = avctx->priv_data;
- Encoder_Interface_exit(s->enstate);
- av_freep(&avctx->coded_frame);
+ Encoder_Interface_exit(s->enc_state);
+ ff_af_queue_close(&s->afq);
return 0;
}
-static int amr_nb_encode_frame(AVCodecContext *avctx,
- unsigned char *frame/*out*/,
- int buf_size, void *data/*in*/)
+static int amr_nb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+ const AVFrame *frame, int *got_packet_ptr)
{
AMRContext *s = avctx->priv_data;
- int written;
+ int written, ret;
+ int16_t *flush_buf = NULL;
+ const int16_t *samples = frame ? (const int16_t *)frame->data[0] : NULL;
- if ((s->enc_bitrate = getBitrateMode(avctx->bit_rate)) < 0) {
- av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
- return AVERROR(ENOSYS);
+ if (s->enc_bitrate != avctx->bit_rate) {
+ s->enc_mode = get_bitrate_mode(avctx->bit_rate, avctx);
+ s->enc_bitrate = avctx->bit_rate;
}
- written = Encoder_Interface_Encode(s->enstate, s->enc_bitrate, data,
- frame, 0);
- /* av_log(NULL, AV_LOG_DEBUG, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
- written, s->enc_bitrate, frame[0] ); */
+ if ((ret = ff_alloc_packet(avpkt, 32))) {
+ av_log(avctx, AV_LOG_ERROR, "Error getting output packet\n");
+ return ret;
+ }
- return written;
+ if (frame) {
+ if (frame->nb_samples < avctx->frame_size) {
+ flush_buf = av_mallocz(avctx->frame_size * sizeof(*flush_buf));
+ if (!flush_buf)
+ return AVERROR(ENOMEM);
+ memcpy(flush_buf, samples, frame->nb_samples * sizeof(*flush_buf));
+ samples = flush_buf;
+ if (frame->nb_samples < avctx->frame_size - avctx->initial_padding)
+ s->enc_last_frame = -1;
+ }
+ if ((ret = ff_af_queue_add(&s->afq, frame)) < 0) {
+ av_freep(&flush_buf);
+ return ret;
+ }
+ } else {
+ if (s->enc_last_frame < 0)
+ return 0;
+ flush_buf = av_mallocz(avctx->frame_size * sizeof(*flush_buf));
+ if (!flush_buf)
+ return AVERROR(ENOMEM);
+ samples = flush_buf;
+ s->enc_last_frame = -1;
+ }
+
+ written = Encoder_Interface_Encode(s->enc_state, s->enc_mode, samples,
+ avpkt->data, 0);
+ ff_dlog(avctx, "amr_nb_encode_frame encoded %d bytes, bitrate %d, first byte was %#02"PRIx8"\n",
+ written, s->enc_mode, *frame->data[0]);
+
+ /* Get the next frame pts/duration */
+ ff_af_queue_remove(&s->afq, avctx->frame_size, &avpkt->pts,
+ &avpkt->duration);
+
+ avpkt->size = written;
+ *got_packet_ptr = 1;
+ av_freep(&flush_buf);
+ return 0;
}
AVCodec ff_libopencore_amrnb_encoder = {
- "libopencore_amrnb",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_AMR_NB,
- sizeof(AMRContext),
- amr_nb_encode_init,
- amr_nb_encode_frame,
- amr_nb_encode_close,
- NULL,
- .sample_fmts = (const enum AVSampleFormat[]){AV_SAMPLE_FMT_S16,AV_SAMPLE_FMT_NONE},
- .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
+ .name = "libopencore_amrnb",
+ .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-NB (Adaptive Multi-Rate Narrow-Band)"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_AMR_NB,
+ .priv_data_size = sizeof(AMRContext),
+ .init = amr_nb_encode_init,
+ .encode2 = amr_nb_encode_frame,
+ .close = amr_nb_encode_close,
+ .capabilities = AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SMALL_LAST_FRAME,
+ .sample_fmts = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
+ AV_SAMPLE_FMT_NONE },
+ .priv_class = &class,
};
+#endif /* CONFIG_LIBOPENCORE_AMRNB_ENCODER */
-#endif
+#endif /* CONFIG_LIBOPENCORE_AMRNB */
/* -----------AMR wideband ------------*/
-#if CONFIG_LIBOPENCORE_AMRWB
+#if CONFIG_LIBOPENCORE_AMRWB_DECODER
#include <opencore-amrwb/dec_if.h>
#include <opencore-amrwb/if_rom.h>
static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
{
AMRWBContext *s = avctx->priv_data;
+ int ret;
- s->state = D_IF_init();
+ if ((ret = amr_decode_fix_avctx(avctx)) < 0)
+ return ret;
- amr_decode_fix_avctx(avctx);
-
- if (avctx->channels > 1) {
- av_log(avctx, AV_LOG_ERROR, "amr_wb: multichannel decoding not supported\n");
- return AVERROR(ENOSYS);
- }
+ s->state = D_IF_init();
return 0;
}
static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,
- int *data_size, AVPacket *avpkt)
+ int *got_frame_ptr, AVPacket *avpkt)
{
+ AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
- AMRWBContext *s = avctx->priv_data;
- int mode;
+ AMRWBContext *s = avctx->priv_data;
+ int mode, ret;
int packet_size;
static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
- if (!buf_size)
- /* nothing to do */
- return 0;
+ /* get output buffer */
+ frame->nb_samples = 320;
+ if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
+ av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
+ return ret;
+ }
- mode = (buf[0] >> 3) & 0x000F;
+ mode = (buf[0] >> 3) & 0x000F;
packet_size = block_size[mode];
if (packet_size > buf_size) {
- av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
+ av_log(avctx, AV_LOG_ERROR, "AMR frame too short (%d, should be %d)\n",
buf_size, packet_size + 1);
return AVERROR_INVALIDDATA;
}
- D_IF_decode(s->state, buf, data, _good_frame);
- *data_size = 320 * 2;
+ D_IF_decode(s->state, buf, (short *)frame->data[0], _good_frame);
+
+ *got_frame_ptr = 1;
+
return packet_size;
}
}
AVCodec ff_libopencore_amrwb_decoder = {
- "libopencore_amrwb",
- AVMEDIA_TYPE_AUDIO,
- CODEC_ID_AMR_WB,
- sizeof(AMRWBContext),
- amr_wb_decode_init,
- NULL,
- amr_wb_decode_close,
- amr_wb_decode_frame,
- .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Wide-Band"),
+ .name = "libopencore_amrwb",
+ .long_name = NULL_IF_CONFIG_SMALL("OpenCORE AMR-WB (Adaptive Multi-Rate Wide-Band)"),
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = AV_CODEC_ID_AMR_WB,
+ .priv_data_size = sizeof(AMRWBContext),
+ .init = amr_wb_decode_init,
+ .close = amr_wb_decode_close,
+ .decode = amr_wb_decode_frame,
+ .capabilities = AV_CODEC_CAP_DR1,
};
-#endif /* CONFIG_LIBOPENCORE_AMRWB */
+#endif /* CONFIG_LIBOPENCORE_AMRWB_DECODER */
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