@@ -22,6 +22,7 @@ version <next>:

 - remaining GPL parts in AC-3 decoder converted to LGPL

 - QCP demuxer

 - SoX native format muxer and demuxer

+- AMR-NB decoding/encoding, AMR-WB decoding via OpenCORE libraries

@@ -39,6 +39,11 @@ Some external libraries, e.g. libx264, are under GPL and can be used in

 conjunction with FFmpeg. They require --enable-gpl to be passed to configure

 as well.

+The OpenCORE external libraries are under the Apache License 2.0. That license

+is incompatible with the LGPL v2.1 and the GPL v2, but not with version 3 of

+those licenses. So to combine the OpenCORE libraries with FFmpeg, the license

+version needs to be upgraded by passing --enable-version3 to configure.

+

 The nonfree external libraries libamrnb, libamrwb and libfaac can be hooked up

 in FFmpeg. You need to pass --enable-nonfree to configure to enable them. Employ

 this option with care as FFmpeg then becomes nonfree and unredistributable.

@@ -152,6 +152,8 @@ show_help(){

   echo "  --enable-bzlib           enable bzlib [autodetect]"

   echo "  --enable-libamr-nb       enable libamr-nb floating point audio codec [no]"

   echo "  --enable-libamr-wb       enable libamr-wb floating point audio codec [no]"

+  echo "  --enable-libopencore-amrnb enable AMR-NB de/encoding via libopencore-amrnb [no]"

+  echo "  --enable-libopencore-amrwb enable AMR-WB decoding via libopencore-amrwb [no]"

   echo "  --enable-libdc1394       enable IIDC-1394 grabbing using libdc1394"

   echo "                           and libraw1394 [no]"

   echo "  --enable-libdirac        enable Dirac support via libdirac [no]"

@@ -792,6 +794,8 @@ CONFIG_LIST="

     libgsm

     libmp3lame

     libnut

+    libopencore_amrnb

+    libopencore_amrwb

     libopenjpeg

     libschroedinger

     libspeex

@@ -1099,6 +1103,9 @@ libgsm_encoder_deps="libgsm"

 libgsm_ms_decoder_deps="libgsm"

 libgsm_ms_encoder_deps="libgsm"

 libmp3lame_encoder_deps="libmp3lame"

+libopencore_amrnb_decoder_deps="libopencore_amrnb"

+libopencore_amrnb_encoder_deps="libopencore_amrnb"

+libopencore_amrwb_decoder_deps="libopencore_amrwb"

 libopenjpeg_decoder_deps="libopenjpeg"

 libschroedinger_decoder_deps="libschroedinger"

 libschroedinger_encoder_deps="libschroedinger"

@@ -1761,6 +1768,9 @@ die_license_disabled nonfree libamr_nb

 die_license_disabled nonfree libamr_wb

 die_license_disabled nonfree libfaac

+die_license_disabled version3 libopencore_amrnb

+die_license_disabled version3 libopencore_amrwb

+

 enabled version3 && { enabled gpl && enable gplv3 || enable lgplv3; }

 check_deps $ARCH_EXT_LIST

@@ -2065,6 +2075,8 @@ enabled libfaad    && require2 libfaad faad.h faacDecOpen -lfaad

 enabled libgsm     && require  libgsm gsm.h gsm_create -lgsm

 enabled libmp3lame && require  libmp3lame lame/lame.h lame_init -lmp3lame -lm

 enabled libnut     && require  libnut libnut.h nut_demuxer_init -lnut

+enabled libopencore_amrnb  && require libopencore_amrnb opencore-amrnb/interf_dec.h Decoder_Interface_init -lopencore-amrnb -lm

+enabled libopencore_amrwb  && require libopencore_amrwb opencore-amrwb/dec_if.h D_IF_init -lopencore-amrwb -lm

 enabled libopenjpeg && require libopenjpeg openjpeg.h opj_version -lopenjpeg

 enabled libschroedinger && add_cflags $(pkg-config --cflags schroedinger-1.0) &&

                            require libschroedinger schroedinger/schro.h schro_init $(pkg-config --libs schroedinger-1.0)

@@ -2373,6 +2385,8 @@ echo "libfaad dlopened          ${libfaadbin-no}"

 echo "libgsm enabled            ${libgsm-no}"

 echo "libmp3lame enabled        ${libmp3lame-no}"

 echo "libnut enabled            ${libnut-no}"

+echo "libopencore-amrnb support ${libopencore_amrnb-no}"

+echo "libopencore-amrwb support ${libopencore_amrwb-no}"

 echo "libopenjpeg enabled       ${libopenjpeg-no}"

 echo "libschroedinger enabled   ${libschroedinger-no}"

 echo "libspeex enabled          ${libspeex-no}"

@@ -18,7 +18,22 @@ explicitly requested by passing the appropriate flags to @file{./configure}.

 AMR comes in two different flavors, wideband and narrowband. FFmpeg can make

 use of the AMR wideband (floating-point mode) and the AMR narrowband

-(floating-point mode) reference decoders and encoders.

+(floating-point mode) reference decoders and encoders (libamr) as well as

+the OpenCORE libraries for AMR-NB decoding/encoding and AMR-WB decoding.

+

+@subsection OpenCORE

+

+Go to @url{http://gitorious.org/opencore-amr/} and follow the instructions for

+installing the libraries. Then pass @code{--enable-libopencore-amrnb} and/or

+@code{--enable-libopencore-amrwb} to configure to enable the libraries.

+

+Note that OpenCORE is under the Apache License 2.0 (see

+@url{http://www.apache.org/licenses/LICENSE-2.0} for details), which is

+incompatible with the LGPL version 2.1 and GPL version 2. You have to

+upgrade FFmpeg's license to LGPL version 3 (or if you have enabled

+GPL components, GPL version 3) to use it.

+

+@subsection libamr

 Go to @url{http://www.penguin.cz/~utx/amr} and follow the instructions for

 installing the libraries. Then pass @code{--enable-libamr-nb} and/or

@@ -519,9 +534,10 @@ following image formats are supported:

     @tab Used in Westwood Studios games like Command and Conquer.

 @item ADPCM Yamaha           @tab  X  @tab  X

 @item AMR-NB                 @tab  E  @tab  E

-    @tab supported through external library libamrnb

+    @tab supported through external libraries libamrnb and libopencore-amrnb

 @item AMR-WB                 @tab  E  @tab  E

-    @tab supported through external library libamrwb

+    @tab decoding supported through external libraries libamrwb and libopencore-amrwb,

+         encoding supported through external library libamrwb

 @item Apple lossless audio   @tab  X  @tab  X

     @tab QuickTime fourcc 'alac'

 @item Atrac 3                @tab     @tab  X

@@ -385,6 +385,8 @@ OBJS-$(CONFIG_LIBFAAC)                 += libfaac.o

 OBJS-$(CONFIG_LIBFAAD)                 += libfaad.o

 OBJS-$(CONFIG_LIBGSM)                  += libgsm.o

 OBJS-$(CONFIG_LIBMP3LAME)              += libmp3lame.o

+OBJS-$(CONFIG_LIBOPENCORE_AMRNB)       += libopencore-amr.o

+OBJS-$(CONFIG_LIBOPENCORE_AMRWB)       += libopencore-amr.o

 OBJS-$(CONFIG_LIBOPENJPEG)             += libopenjpeg.o

 OBJS-$(CONFIG_LIBSCHROEDINGER_DECODER) += libschroedingerdec.o libschroedinger.o libdirac_libschro.o

 OBJS-$(CONFIG_LIBSCHROEDINGER_ENCODER) += libschroedingerenc.o libschroedinger.o libdirac_libschro.o

@@ -309,6 +309,8 @@ void avcodec_register_all(void)

     REGISTER_ENCDEC  (LIBGSM, libgsm);

     REGISTER_ENCDEC  (LIBGSM_MS, libgsm_ms);

     REGISTER_ENCODER (LIBMP3LAME, libmp3lame);

+    REGISTER_ENCDEC  (LIBOPENCORE_AMRNB, libopencore_amrnb);

+    REGISTER_DECODER (LIBOPENCORE_AMRWB, libopencore_amrwb);

     REGISTER_DECODER (LIBOPENJPEG, libopenjpeg);

     REGISTER_ENCDEC  (LIBSCHROEDINGER, libschroedinger);

     REGISTER_DECODER (LIBSPEEX, libspeex);

new file mode 100644

@@ -0,0 +1,325 @@

+/*

+ * 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

+ */

+

+#include "avcodec.h"

+

+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)

+        avctx->sample_rate = 8000 * is_amr_wb;

+

+    if (!avctx->channels)

+        avctx->channels = 1;

+

+    avctx->frame_size = 160 * is_amr_wb;

+    avctx->sample_fmt = SAMPLE_FMT_S16;

+}

+

+#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 */

+    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;

+    int  *enstate;

+    int   enc_bitrate;

+} AMRContext;

+

+static av_cold 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 av_cold int amr_nb_decode_close(AVCodecContext *avctx)

+{

+    AMRContext *s = avctx->priv_data;

+

+    Decoder_Interface_exit(s->decState);

+    return 0;

+}

+

+static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,

+                               int *data_size, AVPacket *avpkt)

+{

+    const uint8_t *buf = avpkt->data;

+    int buf_size       = avpkt->size;

+    AMRContext *s = avctx->priv_data;

+    const uint8_t *amrData = buf;

+    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;

+

+    /* av_log(NULL, AV_LOG_DEBUG, "amr_decode_frame buf=%p buf_size=%d frameCount=%d!!\n",

+              buf, buf_size, s->frameCount); */

+

+    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;

+}

+

+AVCodec libopencore_amrnb_decoder = {

+    "libopencore_amrnb",

+    CODEC_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"),

+};

+

+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 -1;

+    }

+

+    if (avctx->channels != 1) {

+        av_log(avctx, AV_LOG_ERROR, "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) {

+        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 -1;

+    }

+

+    return 0;

+}

+

+static av_cold 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_encode_frame(AVCodecContext *avctx,

+                               unsigned char *frame/*out*/,

+                               int buf_size, void *data/*in*/)

+{

+    AMRContext *s = avctx->priv_data;

+    int written;

+

+    if ((s->enc_bitrate = getBitrateMode(avctx->bit_rate)) < 0) {

+        av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);

+        return -1;

+    }

+

+    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;

+}

+

+AVCodec libopencore_amrnb_encoder = {

+    "libopencore_amrnb",

+    CODEC_TYPE_AUDIO,

+    CODEC_ID_AMR_NB,

+    sizeof(AMRContext),

+    amr_nb_encode_init,

+    amr_nb_encode_frame,

+    amr_nb_encode_close,

+    NULL,

+    .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},

+    .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),

+};

+

+#endif

+

+/* -----------AMR wideband ------------*/

+#if CONFIG_LIBOPENCORE_AMRWB

+

+#ifdef _TYPEDEF_H

+//To avoid duplicate typedefs from typedef in amr-nb

+#define typedef_h

+#endif

+

+#include <opencore-amrwb/dec_if.h>

+#include <opencore-amrwb/if_rom.h>

+

+static const char wb_bitrate_unsupported[] =

+    "bitrate not supported: use one of 6.6k, 8.85k, 12.65k, 14.25k, 15.85k, 18.25k, 19.85k, 23.05k, or 23.85k\n";

+

+/* Common code for fixed and float version*/

+typedef struct AMRWB_bitrates {

+    int rate;

+    int mode;

+} AMRWB_bitrates;

+

+typedef struct AMRWBContext {

+    int    frameCount;

+    void  *state;

+    int    mode;

+    Word16 allow_dtx;

+} AMRWBContext;

+

+static av_cold int amr_wb_decode_init(AVCodecContext *avctx)

+{

+    AMRWBContext *s = 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;

+}

+

+static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,

+                               int *data_size, AVPacket *avpkt)

+{

+    const uint8_t *buf = avpkt->data;

+    int buf_size       = avpkt->size;

+    AMRWBContext *s = avctx->priv_data;

+    const uint8_t *amrData = buf;

+    int mode;

+    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;

+

+    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 = avctx->priv_data;

+

+    D_IF_exit(s->state);

+    return 0;

+}

+

+AVCodec libopencore_amrwb_decoder = {

+    "libopencore_amrwb",

+    CODEC_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"),

+};

+

+#endif /* CONFIG_LIBOPENCORE_AMRWB */