* AMR Audio decoder stub
* Copyright (c) 2003 the ffmpeg project
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * 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 audio encoder/decoder through external reference
+ 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/latest/Rel-5/26_series/26073-510.zip
+ http://www.3gpp.org/ftp/Specs/archive/26_series/26.073/26073-510.zip
Extract the soure into ffmpeg/libavcodec/amr
- To use the float version run "./configure" with "--enable-amr-nb-fixed"
-
+ 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/latest/Rel-5/26_series/26104-510.zip
+ 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
-
- In the future support for AMR-WB might also be included here.
- Reference code exist in TS26.173 and TS 26.204.
-
+
+ --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
+
*/
-#define DEBUG
-//#define AMR_NB_FIXED
-#include "../config.h"
+
#include "avcodec.h"
-#ifdef AMR_NB_FIXED
+#ifdef CONFIG_AMR_NB_FIXED
#define MMS_IO
int startrate;
int stoprate;
enum Mode mode;
-
+
} AMR_bitrates;
/* Match desired bitrate with closest one*/
{7950,9999,MR795},//9
{10000,11999,MR102},//10
{12000,64000,MR122},//12
-
+
};
int i;
- for(i=0;i<sizeof(rates);i++)
+ for(i=0;i<8;i++)
{
if(rates[i].startrate<=bitrate && rates[i].stoprate>=bitrate)
{
return(MR122);
}
-#ifdef AMR_NB_FIXED
+#ifdef CONFIG_AMR_NB_FIXED
/* fixed point version*/
/* frame size in serial bitstream file (frame type + serial stream + flags) */
#define SERIAL_FRAMESIZE (1+MAX_SERIAL_SIZE+5)
Speech_Encode_FrameState *enstate;
sid_syncState *sidstate;
enum TXFrameType tx_frametype;
-
+
} AMRContext;
s->mode= (enum Mode)0;
s->reset_flag=0;
s->reset_flag_old=1;
-
+
if(Speech_Decode_Frame_init(&s->speech_decoder_state, "Decoder"))
{
- printf("Speech_Decode_Frame_init error\n");
+ av_log(avctx, AV_LOG_ERROR, "Speech_Decode_Frame_init error\n");
return -1;
}
return 0;
s->mode= (enum Mode)0;
s->reset_flag=0;
s->reset_flag_old=1;
-
+
if(avctx->sample_rate!=8000)
{
-#ifdef DEBUG
- printf("Only 8000Hz sample rate supported\n");
-#endif
+ if(avctx->debug)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Only 8000Hz sample rate supported\n");
+ }
return -1;
}
if(avctx->channels!=1)
{
-#ifdef DEBUG
- printf("Only mono supported\n");
-#endif
+ if(avctx->debug)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
+ }
return -1;
}
if(Speech_Encode_Frame_init(&s->enstate, 0, "encoder") || sid_sync_init (&s->sidstate))
{
-#ifdef DEBUG
- printf("Speech_Encode_Frame_init error\n");
-#endif
+ if(avctx->debug)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Speech_Encode_Frame_init error\n");
+ }
return -1;
}
int offset=0;
UWord8 toc, q, ft;
-
+
Word16 serial[SERIAL_FRAMESIZE]; /* coded bits */
Word16 *synth;
UWord8 *packed_bits;
- *data_size=0;
static Word16 packed_size[16] = {12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0};
int i;
//We have a new frame
s->frameCount++;
- if (s->rx_type == RX_NO_DATA)
+ if (s->rx_type == RX_NO_DATA)
{
s->mode = s->speech_decoder_state->prev_mode;
}
else {
s->speech_decoder_state->prev_mode = s->mode;
}
-
+
/* if homed: check if this frame is another homing frame */
if (s->reset_flag_old == 1)
{
}
}
else
- {
+ {
/* decode frame */
Speech_Decode_Frame(s->speech_decoder_state, s->mode, &serial[1], s->rx_type, synth);
}
//Each AMR-frame results in 160 16-bit samples
*data_size+=160*2;
synth+=160;
-
+
/* if not homed: check whether current frame is a homing frame */
if (s->reset_flag_old == 0)
{
Speech_Decode_Frame_reset(s->speech_decoder_state);
}
s->reset_flag_old = s->reset_flag;
-
+
}
return offset;
}
static int amr_nb_encode_frame(AVCodecContext *avctx,
- unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
+ unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
{
short serial_data[250] = {0};
AMRContext *s = avctx->priv_data;
int written;
-
+
s->reset_flag = encoder_homing_frame_test(data);
-
- Speech_Encode_Frame(s->enstate, s->enc_bitrate, data, &serial_data[1], &s->mode);
-
+
+ Speech_Encode_Frame(s->enstate, s->enc_bitrate, data, &serial_data[1], &s->mode);
+
/* add frame type and mode */
sid_sync (s->sidstate, s->mode, &s->tx_frametype);
-
+
written = PackBits(s->mode, s->enc_bitrate, s->tx_frametype, &serial_data[1], frame);
-
+
if (s->reset_flag != 0)
{
Speech_Encode_Frame_reset(s->enstate);
}
-#else /* Float point version*/
+#elif defined(CONFIG_AMR_NB) /* Float point version*/
typedef struct AMRContext {
int frameCount;
s->decState=Decoder_Interface_init();
if(!s->decState)
{
- printf("Decoder_Interface_init error\r\n");
+ av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\r\n");
return -1;
}
return 0;
{
AMRContext *s = avctx->priv_data;
s->frameCount=0;
-
+
if(avctx->sample_rate!=8000)
{
-#ifdef DEBUG
- printf("Only 8000Hz sample rate supported\n");
-#endif
+ if(avctx->debug)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Only 8000Hz sample rate supported\n");
+ }
return -1;
}
if(avctx->channels!=1)
{
-#ifdef DEBUG
- printf("Only mono supported\n");
-#endif
+ if(avctx->debug)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
+ }
return -1;
}
s->enstate=Encoder_Interface_init(0);
if(!s->enstate)
{
- printf("Encoder_Interface_init error\n");
+ if(avctx->debug)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Encoder_Interface_init error\n");
+ }
return -1;
}
AMRContext *s = (AMRContext*)avctx->priv_data;
uint8_t*amrData=buf;
- int offset=0;
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;
int packet_size;
- *data_size=0;
- //printf("amr_decode_frame data_size=%i buf=0x%X buf_size=%d frameCount=%d!!\n",*data_size,buf,buf_size,s->frameCount);
+ /* av_log(NULL,AV_LOG_DEBUG,"amr_decode_frame buf=%p buf_size=%d frameCount=%d!!\n",buf,buf_size,s->frameCount); */
- while(offset<buf_size)
- {
- dec_mode = (amrData[offset] >> 3) & 0x000F;
- packet_size = block_size[dec_mode];
-
- s->frameCount++;
- //printf("offset=%d, packet_size=%d amrData= 0x%X %X %X %X\n",offset,packet_size,amrData[offset],amrData[offset+1],amrData[offset+2],amrData[offset+3]);
- /* call decoder */
- Decoder_Interface_Decode(s->decState, &amrData[offset], data+*data_size, 0);
- *data_size+=160*2;
-
- offset+=packet_size+1;
+ if(buf_size==0) {
+ /* nothing to do */
+ return 0;
}
- return buf_size;
+
+ 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", buf_size, packet_size);
+ return -1;
+ }
+
+ s->frameCount++;
+ /* av_log(NULL,AV_LOG_DEBUG,"packet_size=%d amrData= 0x%X %X %X %X\n",packet_size,amrData[0],amrData[1],amrData[2],amrData[3]); */
+ /* call decoder */
+ Decoder_Interface_Decode(s->decState, amrData, data, 0);
+ *data_size=160*2;
+
+ return packet_size;
}
static int amr_nb_encode_frame(AVCodecContext *avctx,
- unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
+ unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
{
AMRContext *s = (AMRContext*)avctx->priv_data;
int written;
- written = Encoder_Interface_Encode(s->enstate,
- s->enc_bitrate,
- data,
- frame,
+ 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] ); */
return written;
}
#endif
+#if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED)
+
AVCodec amr_nb_decoder =
{
"amr_nb",
amr_nb_encode_close,
NULL,
};
+
+#endif
+
+/* -----------AMR wideband ------------*/
+#ifdef CONFIG_AMR_WB
+
+#ifdef _TYPEDEF_H
+//To avoid duplicate typedefs from typdef in amr-nb
+#define typedef_h
+#endif
+
+#include "amrwb_float/enc_if.h"
+#include "amrwb_float/dec_if.h"
+
+/* Common code for fixed and float version*/
+typedef struct AMRWB_bitrates
+{
+ int startrate;
+ int stoprate;
+ 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
+
+ };
+ int i;
+
+ for(i=0;i<9;i++)
+ {
+ if(rates[i].startrate<=bitrate && rates[i].stoprate>=bitrate)
+ {
+ return(rates[i].mode);
+ }
+ }
+ /*Return highest possible*/
+ return(8);
+}
+
+
+typedef struct AMRWBContext {
+ int frameCount;
+ void *state;
+ int mode;
+ Word16 allow_dtx;
+} AMRWBContext;
+
+static int amr_wb_encode_init(AVCodecContext * avctx)
+{
+ AMRWBContext *s = (AMRWBContext*)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");
+ }
+ return -1;
+ }
+
+ if(avctx->channels!=1)
+ {
+ if(avctx->debug)
+ {
+ av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
+ }
+ return -1;
+ }
+
+ avctx->frame_size=320;
+ avctx->coded_frame= avcodec_alloc_frame();
+
+ s->state = E_IF_init();
+ s->mode=getWBBitrateMode(avctx->bit_rate);
+ s->allow_dtx=0;
+
+ return 0;
+}
+
+static int amr_wb_encode_close(AVCodecContext * avctx)
+{
+ AMRWBContext *s = (AMRWBContext*) avctx->priv_data;
+ E_IF_exit(s->state);
+ av_freep(&avctx->coded_frame);
+ s->frameCount++;
+ return 0;
+}
+
+static int amr_wb_encode_frame(AVCodecContext *avctx,
+ unsigned char *frame/*out*/, int buf_size, void *data/*in*/)
+{
+ AMRWBContext *s = (AMRWBContext*) avctx->priv_data;
+ int 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;
+ s->frameCount=0;
+ s->state = D_IF_init();
+ return 0;
+}
+
+extern const UWord8 block_size[];
+
+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;
+
+ uint8_t*amrData=buf;
+ int mode;
+ int packet_size;
+
+ if(buf_size==0) {
+ /* nothing to do */
+ return 0;
+ }
+
+ mode = (amrData[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", buf_size, packet_size+1);
+ return -1;
+ }
+
+ s->frameCount++;
+ D_IF_decode( s->state, amrData, data, _good_frame);
+ *data_size=320*2;
+ return packet_size;
+}
+
+static int amr_wb_decode_close(AVCodecContext * avctx)
+{
+ AMRWBContext *s = (AMRWBContext *)avctx->priv_data;
+ D_IF_exit(s->state);
+ return 0;
+}
+
+AVCodec amr_wb_decoder =
+{
+ "amr_wb",
+ CODEC_TYPE_AUDIO,
+ CODEC_ID_AMR_WB,
+ sizeof(AMRWBContext),
+ amr_wb_decode_init,
+ NULL,
+ amr_wb_decode_close,
+ amr_wb_decode_frame,
+};
+
+AVCodec amr_wb_encoder =
+{
+ "amr_wb",
+ CODEC_TYPE_AUDIO,
+ CODEC_ID_AMR_WB,
+ sizeof(AMRWBContext),
+ amr_wb_encode_init,
+ amr_wb_encode_frame,
+ amr_wb_encode_close,
+ NULL,
+};
+
+#endif //CONFIG_AMR_WB
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