1 files changed, 715 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/amr.c b/contrib/ffmpeg/libavcodec/amr.c
new file mode 100644
index 000000000..2d1877b22
--- /dev/null
+++ b/contrib/ffmpeg/libavcodec/amr.c
@@ -0,0 +1,715 @@
+/*
+ * AMR Audio decoder stub
+ * Copyright (c) 2003 the ffmpeg project
+ *
+ * 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 2.1 of the License, or (at your option) any later version.
+ *
+ * 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 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
+
+ */
+
+#include "avcodec.h"
+
+#ifdef CONFIG_AMR_NB_FIXED
+
+#define MMS_IO
+
+#include "amr/sp_dec.h"
+#include "amr/d_homing.h"
+#include "amr/typedef.h"
+#include "amr/sp_enc.h"
+#include "amr/sid_sync.h"
+#include "amr/e_homing.h"
+
+#else
+#include "amr_float/interf_dec.h"
+#include "amr_float/interf_enc.h"
+#endif
+
+/* Common code for fixed and float version*/
+typedef struct AMR_bitrates
+{
+    int startrate;
+    int stoprate;
+    enum Mode mode;
+
+} AMR_bitrates;
+
+/* Match desired bitrate with closest one*/
+static enum Mode 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
+
+                         };
+    int i;
+    for(i=0;i<8;i++)
+    {
+        if(rates[i].startrate<=bitrate && rates[i].stoprate>=bitrate)
+        {
+            return(rates[i].mode);
+        }
+    }
+    /*Return highest possible*/
+    return(MR122);
+}
+
+static void amr_decode_fix_avctx(AVCodecContext * avctx)
+{
+    const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
+
+    if(avctx->sample_rate == 0)
+    {
+        avctx->sample_rate = 8000 * is_amr_wb;
+    }
+
+    if(avctx->channels == 0)
+    {
+        avctx->channels = 1;
+    }
+
+    avctx->frame_size = 160 * is_amr_wb;
+}
+
+#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)
+
+typedef struct AMRContext {
+    int frameCount;
+    Speech_Decode_FrameState *speech_decoder_state;
+    enum RXFrameType rx_type;
+    enum Mode mode;
+    Word16 reset_flag;
+    Word16 reset_flag_old;
+
+    enum Mode 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;
+    s->mode= (enum Mode)0;
+    s->reset_flag=0;
+    s->reset_flag_old=1;
+
+    if(Speech_Decode_Frame_init(&s->speech_decoder_state, "Decoder"))
+    {
+        av_log(avctx, AV_LOG_ERROR, "Speech_Decode_Frame_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 -1;
+    }
+
+    return 0;
+}
+
+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;
+    s->mode= (enum Mode)0;
+    s->reset_flag=0;
+    s->reset_flag_old=1;
+
+    if(avctx->sample_rate!=8000)
+    {
+        if(avctx->debug)
+        {
+            av_log(avctx, AV_LOG_DEBUG, "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");
+        }
+        return -1;
+    }
+
+    avctx->frame_size=160;
+    avctx->coded_frame= avcodec_alloc_frame();
+
+    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");
+        }
+        return -1;
+    }
+
+    s->enc_bitrate=getBitrateMode(avctx->bit_rate);
+
+    return 0;
+}
+
+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);
+    return 0;
+}
+
+static int amr_nb_decode_close(AVCodecContext * avctx)
+{
+    AMRContext *s = avctx->priv_data;
+    Speech_Decode_Frame_exit(&s->speech_decoder_state);
+    return 0;
+}
+
+static int amr_nb_decode_frame(AVCodecContext * avctx,
+            void *data, int *data_size,
+            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;
+
+    //printf("amr_decode_frame data_size=%i buf=0x%X buf_size=%d frameCount=%d!!\n",*data_size,buf,buf_size,s->frameCount);
+
+    synth=data;
+
+//    while(offset<buf_size)
+    {
+        toc=amrData[offset];
+        /* read rest of the frame based on ToC byte */
+        q  = (toc >> 2) & 0x01;
+        ft = (toc >> 3) & 0x0F;
+
+        //printf("offset=%d, packet_size=%d amrData= 0x%X %X %X %X\n",offset,packed_size[ft],amrData[offset],amrData[offset+1],amrData[offset+2],amrData[offset+3]);
+
+        offset++;
+
+        packed_bits=amrData+offset;
+
+        offset+=packed_size[ft];
+
+        //Unsort and unpack bits
+        s->rx_type = UnpackBits(q, ft, packed_bits, &s->mode, &serial[1]);
+
+        //We have a new frame
+        s->frameCount++;
+
+        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)
+        {
+            /* only check until end of first subframe */
+            s->reset_flag = decoder_homing_frame_test_first(&serial[1], s->mode);
+        }
+        /* produce encoder homing frame if homed & input=decoder homing frame */
+        if ((s->reset_flag != 0) && (s->reset_flag_old != 0))
+        {
+            for (i = 0; i < L_FRAME; i++)
+            {
+                synth[i] = EHF_MASK;
+            }
+        }
+        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)
+        {
+            /* check whole frame */
+            s->reset_flag = decoder_homing_frame_test(&serial[1], s->mode);
+        }
+        /* reset decoder if current frame is a homing frame */
+        if (s->reset_flag != 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*/)
+{
+    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);
+
+    /* 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);
+        sid_sync_reset(s->sidstate);
+    }
+    return written;
+}
+
+
+#elif defined(CONFIG_AMR_NB) /* Float point version*/
+
+typedef struct AMRContext {
+    int frameCount;
+    void * decState;
+    int *enstate;
+    enum Mode 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)
+    {
+        av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\r\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 -1;
+    }
+
+    return 0;
+}
+
+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");
+        }
+        return -1;
+    }
+
+    if(avctx->channels!=1)
+    {
+        if(avctx->debug)
+        {
+            av_log(avctx, AV_LOG_DEBUG, "Only mono supported\n");
+        }
+        return -1;
+    }
+
+    avctx->frame_size=160;
+    avctx->coded_frame= avcodec_alloc_frame();
+
+    s->enstate=Encoder_Interface_init(0);
+    if(!s->enstate)
+    {
+        if(avctx->debug)
+        {
+            av_log(avctx, AV_LOG_DEBUG, "Encoder_Interface_init error\n");
+        }
+        return -1;
+    }
+
+    s->enc_bitrate=getBitrateMode(avctx->bit_rate);
+
+    return 0;
+}
+
+static int amr_nb_decode_close(AVCodecContext * avctx)
+{
+    AMRContext *s = avctx->priv_data;
+    Decoder_Interface_exit(s->decState);
+    return 0;
+}
+
+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;
+}
+
+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;
+
+    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;
+    int packet_size;
+
+    /* 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;
+
+    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*/)
+{
+    AMRContext *s = (AMRContext*)avctx->priv_data;
+    int written;
+
+    s->enc_bitrate=getBitrateMode(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] ); */
+
+    return written;
+}
+
+#endif
+
+#if defined(CONFIG_AMR_NB) || defined(CONFIG_AMR_NB_FIXED)
+
+AVCodec amr_nb_decoder =
+{
+    "amr_nb",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_AMR_NB,
+    sizeof(AMRContext),
+    amr_nb_decode_init,
+    NULL,
+    amr_nb_decode_close,
+    amr_nb_decode_frame,
+};
+
+AVCodec amr_nb_encoder =
+{
+    "amr_nb",
+    CODEC_TYPE_AUDIO,
+    CODEC_ID_AMR_NB,
+    sizeof(AMRContext),
+    amr_nb_encode_init,
+    amr_nb_encode_frame,
+    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;
+    int size;
+    s = (AMRWBContext*) avctx->priv_data;
+    s->mode=getWBBitrateMode(avctx->bit_rate);
+    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();
+
+    amr_decode_fix_avctx(avctx);
+
+    if(avctx->channels > 1)
+    {
+        av_log(avctx, AV_LOG_ERROR, "amr_wb: multichannel decoding not supported\n");
+        return -1;
+    }
+
+    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