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Diffstat (limited to 'contrib/ffmpeg/libavcodec/amr.c')
-rw-r--r--contrib/ffmpeg/libavcodec/amr.c266
1 files changed, 133 insertions, 133 deletions
diff --git a/contrib/ffmpeg/libavcodec/amr.c b/contrib/ffmpeg/libavcodec/amr.c
index 2d1877b22..6a8193f0b 100644
--- a/contrib/ffmpeg/libavcodec/amr.c
+++ b/contrib/ffmpeg/libavcodec/amr.c
@@ -18,41 +18,53 @@
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
- /*
- This code implements amr-nb and amr-wb audio encoder/decoder through external reference
- code from www.3gpp.org. The licence of the code from 3gpp is unclear so you
- have to download the code separately. Two versions exists: One fixed-point
- and one with floats. For some reason the float-encoder is significant faster
- atleast on a P4 1.5GHz (0.9s instead of 9.9s on a 30s audio clip at MR102).
- Both float and fixed point is supported for amr-nb, but only float for
- amr-wb.
-
- --AMR-NB--
- The fixed-point (TS26.073) can be downloaded from:
- http://www.3gpp.org/ftp/Specs/archive/26_series/26.073/26073-510.zip
- Extract the soure into ffmpeg/libavcodec/amr
- To use the fixed version run "./configure" with "--enable-amr_nb-fixed"
-
- The float version (default) can be downloaded from:
- http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-510.zip
- Extract the soure into ffmpeg/libavcodec/amr_float
-
- The specification for amr-nb can be found in TS 26.071
- (http://www.3gpp.org/ftp/Specs/html-info/26071.htm) and some other
- info at http://www.3gpp.org/ftp/Specs/html-info/26-series.htm
-
- --AMR-WB--
- The reference code can be downloaded from:
- http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-510.zip
- It should be extracted to "libavcodec/amrwb_float". Enable it with
- "--enable-amr_wb".
-
- The specification for amr-wb can be downloaded from:
- http://www.3gpp.org/ftp/Specs/archive/26_series/26.171/26171-500.zip
-
- If someone want to use the fixed point version it can be downloaded
- from: http://www.3gpp.org/ftp/Specs/archive/26_series/26.173/26173-571.zip
+ /** @file
+ * Adaptive Multi-Rate (AMR) Audio decoder stub.
+ *
+ * This code implements both an AMR-NarrowBand (AMR-NB) and an AMR-WideBand
+ * (AMR-WB) audio encoder/decoder through external reference code from
+ * http://www.3gpp.org/. The license of the code from 3gpp is unclear so you
+ * have to download the code separately. Two versions exists: One fixed-point
+ * and one with floats. For some reason the float-encoder is significant faster
+ * at least on a P4 1.5GHz (0.9s instead of 9.9s on a 30s audio clip at MR102).
+ * Both float and fixed point are supported for AMR-NB, but only float for
+ * AMR-WB.
+ *
+ * \section AMR-NB
+ *
+ * \subsection Float
+ * The float version (default) can be downloaded from:
+ * http://www.3gpp.org/ftp/Specs/archive/26_series/26.104/26104-610.zip
+ * Extract the source into \c "ffmpeg/libavcodec/amr_float".
+ *
+ * \subsection Fixed-point
+ * The fixed-point (TS26.073) can be downloaded from:
+ * http://www.3gpp.org/ftp/Specs/archive/26_series/26.073/26073-510.zip.
+ * Extract the source into \c "ffmpeg/libavcodec/amr".
+ * To use the fixed version run \c "./configure" with \c "--enable-amr_nb-fixed".
+ *
+ * \subsection Specification
+ * The specification for AMR-NB can be found in TS 26.071
+ * (http://www.3gpp.org/ftp/Specs/html-info/26071.htm) and some other
+ * info at http://www.3gpp.org/ftp/Specs/html-info/26-series.htm.
+ *
+ * \section AMR-WB
+ * \subsection Float
+ * The reference code can be downloaded from:
+ * http://www.3gpp.org/ftp/Specs/archive/26_series/26.204/26204-600.zip
+ * It should be extracted to \c "ffmpeg/libavcodec/amrwb_float". Enable it with
+ * \c "--enable-amr_wb".
+ *
+ * \subsection Fixed-point
+ * If someone wants to use the fixed point version it can be downloaded from:
+ * http://www.3gpp.org/ftp/Specs/archive/26_series/26.173/26173-571.zip.
+ *
+ * \subsection Specification
+ * The specification for AMR-WB can be found in TS 26.171
+ * (http://www.3gpp.org/ftp/Specs/html-info/26171.htm) and some other
+ * info at http://www.3gpp.org/ftp/Specs/html-info/26-series.htm.
+ *
*/
#include "avcodec.h"
@@ -76,37 +88,34 @@
/* Common code for fixed and float version*/
typedef struct AMR_bitrates
{
- int startrate;
- int stoprate;
+ int rate;
enum Mode mode;
-
} AMR_bitrates;
-/* Match desired bitrate with closest one*/
-static enum Mode getBitrateMode(int bitrate)
+/* Match desired bitrate */
+static int getBitrateMode(int bitrate)
{
- /* Adjusted so that all bitrates can be used from commandline where
- only a multiple of 1000 can be specified*/
- AMR_bitrates rates[]={ {0,4999,MR475}, //4
- {5000,5899,MR515},//5
- {5900,6699,MR59},//6
- {6700,7000,MR67},//7
- {7001,7949,MR74},//8
- {7950,9999,MR795},//9
- {10000,11999,MR102},//10
- {12000,64000,MR122},//12
-
+ /* make the correspondance between bitrate and mode */
+ 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].startrate<=bitrate && rates[i].stoprate>=bitrate)
+ if(rates[i].rate==bitrate)
{
return(rates[i].mode);
}
}
- /*Return highest possible*/
- return(MR122);
+ /* no bitrate matching, return an error */
+ return -1;
}
static void amr_decode_fix_avctx(AVCodecContext * avctx)
@@ -139,17 +148,16 @@ typedef struct AMRContext {
Word16 reset_flag;
Word16 reset_flag_old;
- enum Mode enc_bitrate;
+ int enc_bitrate;
Speech_Encode_FrameState *enstate;
sid_syncState *sidstate;
enum TXFrameType tx_frametype;
-
-
} AMRContext;
static int amr_nb_decode_init(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
s->frameCount=0;
s->speech_decoder_state=NULL;
s->rx_type = (enum RXFrameType)0;
@@ -177,6 +185,7 @@ static int amr_nb_decode_init(AVCodecContext * avctx)
static int amr_nb_encode_init(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
s->frameCount=0;
s->speech_decoder_state=NULL;
s->rx_type = (enum RXFrameType)0;
@@ -186,19 +195,13 @@ static int amr_nb_encode_init(AVCodecContext * avctx)
if(avctx->sample_rate!=8000)
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Only 8000Hz sample rate supported\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
return -1;
}
if(avctx->channels!=1)
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
return -1;
}
@@ -207,14 +210,15 @@ static int amr_nb_encode_init(AVCodecContext * avctx)
if(Speech_Encode_Frame_init(&s->enstate, 0, "encoder") || sid_sync_init (&s->sidstate))
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Speech_Encode_Frame_init error\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Speech_Encode_Frame_init error\n");
return -1;
}
- s->enc_bitrate=getBitrateMode(avctx->bit_rate);
+ if((s->enc_bitrate=getBitrateMode(avctx->bit_rate))<0)
+ {
+ av_log(avctx, AV_LOG_ERROR, "bitrate not supported\n");
+ return -1;
+ }
return 0;
}
@@ -222,6 +226,7 @@ static int amr_nb_encode_init(AVCodecContext * avctx)
static int amr_nb_encode_close(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
Speech_Encode_Frame_exit(&s->enstate);
sid_sync_exit (&s->sidstate);
av_freep(&avctx->coded_frame);
@@ -231,6 +236,7 @@ static int amr_nb_encode_close(AVCodecContext * avctx)
static int amr_nb_decode_close(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
Speech_Decode_Frame_exit(&s->speech_decoder_state);
return 0;
}
@@ -240,16 +246,12 @@ static int amr_nb_decode_frame(AVCodecContext * avctx,
uint8_t * buf, int buf_size)
{
AMRContext *s = avctx->priv_data;
-
uint8_t*amrData=buf;
int offset=0;
-
UWord8 toc, q, ft;
-
Word16 serial[SERIAL_FRAMESIZE]; /* coded bits */
Word16 *synth;
UWord8 *packed_bits;
-
static Word16 packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
int i;
@@ -332,7 +334,6 @@ static int amr_nb_encode_frame(AVCodecContext *avctx,
unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
{
short serial_data[250] = {0};
-
AMRContext *s = avctx->priv_data;
int written;
@@ -360,12 +361,13 @@ typedef struct AMRContext {
int frameCount;
void * decState;
int *enstate;
- enum Mode enc_bitrate;
+ int enc_bitrate;
} AMRContext;
static int amr_nb_decode_init(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
s->frameCount=0;
s->decState=Decoder_Interface_init();
if(!s->decState)
@@ -388,23 +390,18 @@ static int amr_nb_decode_init(AVCodecContext * avctx)
static int amr_nb_encode_init(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
s->frameCount=0;
if(avctx->sample_rate!=8000)
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Only 8000Hz sample rate supported\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
return -1;
}
if(avctx->channels!=1)
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
return -1;
}
@@ -414,14 +411,15 @@ static int amr_nb_encode_init(AVCodecContext * avctx)
s->enstate=Encoder_Interface_init(0);
if(!s->enstate)
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Encoder_Interface_init error\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
return -1;
}
- s->enc_bitrate=getBitrateMode(avctx->bit_rate);
+ if((s->enc_bitrate=getBitrateMode(avctx->bit_rate))<0)
+ {
+ av_log(avctx, AV_LOG_ERROR, "bitrate not supported\n");
+ return -1;
+ }
return 0;
}
@@ -429,6 +427,7 @@ static int amr_nb_encode_init(AVCodecContext * avctx)
static int amr_nb_decode_close(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
Decoder_Interface_exit(s->decState);
return 0;
}
@@ -436,6 +435,7 @@ static int amr_nb_decode_close(AVCodecContext * avctx)
static int amr_nb_encode_close(AVCodecContext * avctx)
{
AMRContext *s = avctx->priv_data;
+
Encoder_Interface_exit(s->enstate);
av_freep(&avctx->coded_frame);
return 0;
@@ -445,8 +445,7 @@ static int amr_nb_decode_frame(AVCodecContext * avctx,
void *data, int *data_size,
uint8_t * buf, int buf_size)
{
- AMRContext *s = (AMRContext*)avctx->priv_data;
-
+ AMRContext *s = avctx->priv_data;
uint8_t*amrData=buf;
static short block_size[16]={ 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
enum Mode dec_mode;
@@ -454,11 +453,6 @@ static int amr_nb_decode_frame(AVCodecContext * avctx,
/* av_log(NULL,AV_LOG_DEBUG,"amr_decode_frame buf=%p buf_size=%d frameCount=%d!!\n",buf,buf_size,s->frameCount); */
- if(buf_size==0) {
- /* nothing to do */
- return 0;
- }
-
dec_mode = (buf[0] >> 3) & 0x000F;
packet_size = block_size[dec_mode]+1;
@@ -479,10 +473,14 @@ static int amr_nb_decode_frame(AVCodecContext * avctx,
static int amr_nb_encode_frame(AVCodecContext *avctx,
unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
{
- AMRContext *s = (AMRContext*)avctx->priv_data;
+ AMRContext *s = avctx->priv_data;
int written;
- s->enc_bitrate=getBitrateMode(avctx->bit_rate);
+ if((s->enc_bitrate=getBitrateMode(avctx->bit_rate))<0)
+ {
+ av_log(avctx, AV_LOG_ERROR, "bitrate not supported\n");
+ return -1;
+ }
written = Encoder_Interface_Encode(s->enstate,
s->enc_bitrate,
@@ -538,38 +536,34 @@ AVCodec amr_nb_encoder =
/* Common code for fixed and float version*/
typedef struct AMRWB_bitrates
{
- int startrate;
- int stoprate;
+ int rate;
int mode;
-
} AMRWB_bitrates;
static int getWBBitrateMode(int bitrate)
{
- /* Adjusted so that all bitrates can be used from commandline where
- only a multiple of 1000 can be specified*/
- AMRWB_bitrates rates[]={ {0,7999,0}, //6.6kHz
- {8000,9999,1},//8.85
- {10000,13000,2},//12.65
- {13001,14999,3},//14.25
- {15000,17000,4},//15.85
- {17001,18000,5},//18.25
- {18001,22000,6},//19.85
- {22001,23000,7},//23.05
- {23001,24000,8},//23.85
-
+ /* make the correspondance between bitrate and mode */
+ AMRWB_bitrates rates[]={ {6600,0},
+ {8850,1},
+ {12650,2},
+ {14250,3},
+ {15850,4},
+ {18250,5},
+ {19850,6},
+ {23050,7},
+ {23850,8},
};
int i;
for(i=0;i<9;i++)
{
- if(rates[i].startrate<=bitrate && rates[i].stoprate>=bitrate)
+ if(rates[i].rate==bitrate)
{
return(rates[i].mode);
}
}
- /*Return highest possible*/
- return(8);
+ /* no bitrate matching, return an error */
+ return -1;
}
@@ -582,24 +576,25 @@ typedef struct AMRWBContext {
static int amr_wb_encode_init(AVCodecContext * avctx)
{
- AMRWBContext *s = (AMRWBContext*)avctx->priv_data;
+ AMRWBContext *s = avctx->priv_data;
+
s->frameCount=0;
if(avctx->sample_rate!=16000)
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Only 16000Hz sample rate supported\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Only 16000Hz sample rate supported\n");
return -1;
}
if(avctx->channels!=1)
{
- if(avctx->debug)
- {
- av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
- }
+ av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
+ return -1;
+ }
+
+ if((s->mode=getWBBitrateMode(avctx->bit_rate))<0)
+ {
+ av_log(avctx, AV_LOG_ERROR, "bitrate not supported\n");
return -1;
}
@@ -607,7 +602,6 @@ static int amr_wb_encode_init(AVCodecContext * avctx)
avctx->coded_frame= avcodec_alloc_frame();
s->state = E_IF_init();
- s->mode=getWBBitrateMode(avctx->bit_rate);
s->allow_dtx=0;
return 0;
@@ -615,7 +609,8 @@ static int amr_wb_encode_init(AVCodecContext * avctx)
static int amr_wb_encode_close(AVCodecContext * avctx)
{
- AMRWBContext *s = (AMRWBContext*) avctx->priv_data;
+ AMRWBContext *s = avctx->priv_data;
+
E_IF_exit(s->state);
av_freep(&avctx->coded_frame);
s->frameCount++;
@@ -625,17 +620,22 @@ static int amr_wb_encode_close(AVCodecContext * avctx)
static int amr_wb_encode_frame(AVCodecContext *avctx,
unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
{
- AMRWBContext *s;
+ AMRWBContext *s = avctx->priv_data;
int size;
- s = (AMRWBContext*) avctx->priv_data;
- s->mode=getWBBitrateMode(avctx->bit_rate);
+
+ if((s->mode=getWBBitrateMode(avctx->bit_rate))<0)
+ {
+ av_log(avctx, AV_LOG_ERROR, "bitrate not supported\n");
+ return -1;
+ }
size = E_IF_encode(s->state, s->mode, data, frame, s->allow_dtx);
return size;
}
static int amr_wb_decode_init(AVCodecContext * avctx)
{
- AMRWBContext *s = (AMRWBContext *)avctx->priv_data;
+ AMRWBContext *s = avctx->priv_data;
+
s->frameCount=0;
s->state = D_IF_init();
@@ -656,8 +656,7 @@ static int amr_wb_decode_frame(AVCodecContext * avctx,
void *data, int *data_size,
uint8_t * buf, int buf_size)
{
- AMRWBContext *s = (AMRWBContext*)avctx->priv_data;
-
+ AMRWBContext *s = avctx->priv_data;
uint8_t*amrData=buf;
int mode;
int packet_size;
@@ -683,7 +682,8 @@ static int amr_wb_decode_frame(AVCodecContext * avctx,
static int amr_wb_decode_close(AVCodecContext * avctx)
{
- AMRWBContext *s = (AMRWBContext *)avctx->priv_data;
+ AMRWBContext *s = avctx->priv_data;
+
D_IF_exit(s->state);
return 0;
}
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