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@@ -0,0 +1,325 @@
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+/*
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+ * AMR Audio decoder stub
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+ * Copyright (c) 2003 the ffmpeg project
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+ *
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+ * This file is part of FFmpeg.
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+ *
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+ * FFmpeg is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * FFmpeg is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#include "avcodec.h"
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+
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+static void amr_decode_fix_avctx(AVCodecContext *avctx)
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+{
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+ const int is_amr_wb = 1 + (avctx->codec_id == CODEC_ID_AMR_WB);
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+
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+ if (!avctx->sample_rate)
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+ avctx->sample_rate = 8000 * is_amr_wb;
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+
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+ if (!avctx->channels)
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+ avctx->channels = 1;
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+
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+ avctx->frame_size = 160 * is_amr_wb;
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+ avctx->sample_fmt = SAMPLE_FMT_S16;
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+}
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+
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+#if CONFIG_LIBOPENCORE_AMRNB
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+
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+#include <opencore-amrnb/interf_dec.h>
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+#include <opencore-amrnb/interf_enc.h>
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+
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+static const char nb_bitrate_unsupported[] =
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+ "bitrate not supported: use one of 4.75k, 5.15k, 5.9k, 6.7k, 7.4k, 7.95k, 10.2k or 12.2k\n";
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+
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+/* Common code for fixed and float version*/
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+typedef struct AMR_bitrates {
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+ int rate;
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+ enum Mode mode;
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+} AMR_bitrates;
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+
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+/* Match desired bitrate */
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+static int getBitrateMode(int bitrate)
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+{
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+ /* make the correspondance between bitrate and mode */
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+ AMR_bitrates rates[] = { { 4750, MR475},
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+ { 5150, MR515},
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+ { 5900, MR59},
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+ { 6700, MR67},
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+ { 7400, MR74},
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+ { 7950, MR795},
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+ {10200, MR102},
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+ {12200, MR122}, };
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+ int i;
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+
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+ for (i = 0; i < 8; i++)
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+ if (rates[i].rate == bitrate)
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+ return rates[i].mode;
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+ /* no bitrate matching, return an error */
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+ return -1;
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+}
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+
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+typedef struct AMRContext {
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+ int frameCount;
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+ void *decState;
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+ int *enstate;
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+ int enc_bitrate;
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+} AMRContext;
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+
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+static av_cold int amr_nb_decode_init(AVCodecContext *avctx)
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+{
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+ AMRContext *s = avctx->priv_data;
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+
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+ s->frameCount = 0;
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+ s->decState = Decoder_Interface_init();
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+ if (!s->decState) {
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+ av_log(avctx, AV_LOG_ERROR, "Decoder_Interface_init error\r\n");
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+ return -1;
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+ }
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+
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+ amr_decode_fix_avctx(avctx);
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+
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+ if (avctx->channels > 1) {
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+ av_log(avctx, AV_LOG_ERROR, "amr_nb: multichannel decoding not supported\n");
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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+static av_cold int amr_nb_decode_close(AVCodecContext *avctx)
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+{
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+ AMRContext *s = avctx->priv_data;
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+
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+ Decoder_Interface_exit(s->decState);
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+ return 0;
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+}
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+
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+static int amr_nb_decode_frame(AVCodecContext *avctx, void *data,
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+ int *data_size, AVPacket *avpkt)
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+{
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+ const uint8_t *buf = avpkt->data;
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+ int buf_size = avpkt->size;
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+ AMRContext *s = avctx->priv_data;
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+ const uint8_t *amrData = buf;
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+ static const uint8_t block_size[16] = { 12, 13, 15, 17, 19, 20, 26, 31, 5, 0, 0, 0, 0, 0, 0, 0 };
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+ enum Mode dec_mode;
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+ int packet_size;
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+
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+ /* av_log(NULL, AV_LOG_DEBUG, "amr_decode_frame buf=%p buf_size=%d frameCount=%d!!\n",
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+ buf, buf_size, s->frameCount); */
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+
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+ dec_mode = (buf[0] >> 3) & 0x000F;
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+ packet_size = block_size[dec_mode] + 1;
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+
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+ if (packet_size > buf_size) {
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+ av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
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+ buf_size, packet_size);
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+ return -1;
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+ }
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+
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+ s->frameCount++;
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+ /* av_log(NULL, AV_LOG_DEBUG, "packet_size=%d amrData= 0x%X %X %X %X\n",
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+ packet_size, amrData[0], amrData[1], amrData[2], amrData[3]); */
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+ /* call decoder */
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+ Decoder_Interface_Decode(s->decState, amrData, data, 0);
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+ *data_size = 160 * 2;
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+
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+ return packet_size;
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+}
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+
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+AVCodec libopencore_amrnb_decoder = {
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+ "libopencore_amrnb",
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+ CODEC_TYPE_AUDIO,
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+ CODEC_ID_AMR_NB,
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+ sizeof(AMRContext),
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+ amr_nb_decode_init,
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+ NULL,
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+ amr_nb_decode_close,
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+ amr_nb_decode_frame,
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+ .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
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+};
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+
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+static av_cold int amr_nb_encode_init(AVCodecContext *avctx)
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+{
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+ AMRContext *s = avctx->priv_data;
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+
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+ s->frameCount = 0;
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+
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+ if (avctx->sample_rate != 8000) {
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+ av_log(avctx, AV_LOG_ERROR, "Only 8000Hz sample rate supported\n");
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+ return -1;
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+ }
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+
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+ if (avctx->channels != 1) {
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+ av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
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+ return -1;
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+ }
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+
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+ avctx->frame_size = 160;
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+ avctx->coded_frame = avcodec_alloc_frame();
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+
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+ s->enstate=Encoder_Interface_init(0);
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+ if (!s->enstate) {
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+ av_log(avctx, AV_LOG_ERROR, "Encoder_Interface_init error\n");
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+ return -1;
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+ }
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+
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+ if ((s->enc_bitrate = getBitrateMode(avctx->bit_rate)) < 0) {
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+ av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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+static av_cold int amr_nb_encode_close(AVCodecContext *avctx)
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+{
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+ AMRContext *s = avctx->priv_data;
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+
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+ Encoder_Interface_exit(s->enstate);
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+ av_freep(&avctx->coded_frame);
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+ return 0;
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+}
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+
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+static int amr_nb_encode_frame(AVCodecContext *avctx,
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+ unsigned char *frame/*out*/,
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+ int buf_size, void *data/*in*/)
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+{
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+ AMRContext *s = avctx->priv_data;
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+ int written;
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+
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+ if ((s->enc_bitrate = getBitrateMode(avctx->bit_rate)) < 0) {
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+ av_log(avctx, AV_LOG_ERROR, nb_bitrate_unsupported);
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+ return -1;
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+ }
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+
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+ written = Encoder_Interface_Encode(s->enstate, s->enc_bitrate, data,
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+ frame, 0);
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+ /* av_log(NULL, AV_LOG_DEBUG, "amr_nb_encode_frame encoded %u bytes, bitrate %u, first byte was %#02x\n",
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+ written, s->enc_bitrate, frame[0] ); */
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+
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+ return written;
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+}
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+
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+AVCodec libopencore_amrnb_encoder = {
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+ "libopencore_amrnb",
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+ CODEC_TYPE_AUDIO,
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+ CODEC_ID_AMR_NB,
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+ sizeof(AMRContext),
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+ amr_nb_encode_init,
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+ amr_nb_encode_frame,
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+ amr_nb_encode_close,
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+ NULL,
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+ .sample_fmts = (enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
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+ .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Narrow-Band"),
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+};
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+
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+#endif
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+
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+/* -----------AMR wideband ------------*/
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+#if CONFIG_LIBOPENCORE_AMRWB
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+
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+#ifdef _TYPEDEF_H
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+//To avoid duplicate typedefs from typedef in amr-nb
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+#define typedef_h
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+#endif
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+
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+#include <opencore-amrwb/dec_if.h>
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+#include <opencore-amrwb/if_rom.h>
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+
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+static const char wb_bitrate_unsupported[] =
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+ "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";
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+
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+/* Common code for fixed and float version*/
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+typedef struct AMRWB_bitrates {
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+ int rate;
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+ int mode;
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+} AMRWB_bitrates;
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+
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+typedef struct AMRWBContext {
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+ int frameCount;
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+ void *state;
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+ int mode;
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+ Word16 allow_dtx;
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+} AMRWBContext;
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+
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+static av_cold int amr_wb_decode_init(AVCodecContext *avctx)
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+{
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+ AMRWBContext *s = avctx->priv_data;
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+
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+ s->frameCount = 0;
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+ s->state = D_IF_init();
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+
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+ amr_decode_fix_avctx(avctx);
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+
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+ if (avctx->channels > 1) {
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+ av_log(avctx, AV_LOG_ERROR, "amr_wb: multichannel decoding not supported\n");
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+ return -1;
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+ }
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+
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+ return 0;
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+}
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+
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+static int amr_wb_decode_frame(AVCodecContext *avctx, void *data,
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+ int *data_size, AVPacket *avpkt)
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+{
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+ const uint8_t *buf = avpkt->data;
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+ int buf_size = avpkt->size;
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+ AMRWBContext *s = avctx->priv_data;
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+ const uint8_t *amrData = buf;
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+ int mode;
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+ int packet_size;
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+ static const uint8_t block_size[16] = {18, 24, 33, 37, 41, 47, 51, 59, 61, 6, 6, 0, 0, 0, 1, 1};
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+
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+ if (!buf_size)
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+ /* nothing to do */
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+ return 0;
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+
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+ mode = (amrData[0] >> 3) & 0x000F;
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+ packet_size = block_size[mode];
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+
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+ if (packet_size > buf_size) {
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+ av_log(avctx, AV_LOG_ERROR, "amr frame too short (%u, should be %u)\n",
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+ buf_size, packet_size + 1);
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+ return -1;
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+ }
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+
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+ s->frameCount++;
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+ D_IF_decode(s->state, amrData, data, _good_frame);
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+ *data_size = 320 * 2;
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+ return packet_size;
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+}
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+
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+static int amr_wb_decode_close(AVCodecContext *avctx)
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+{
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+ AMRWBContext *s = avctx->priv_data;
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+
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+ D_IF_exit(s->state);
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+ return 0;
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+}
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+
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+AVCodec libopencore_amrwb_decoder = {
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+ "libopencore_amrwb",
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+ CODEC_TYPE_AUDIO,
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+ CODEC_ID_AMR_WB,
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+ sizeof(AMRWBContext),
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+ amr_wb_decode_init,
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+ NULL,
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+ amr_wb_decode_close,
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+ amr_wb_decode_frame,
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+ .long_name = NULL_IF_CONFIG_SMALL("OpenCORE Adaptive Multi-Rate (AMR) Wide-Band"),
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+};
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+
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+#endif /* CONFIG_LIBOPENCORE_AMRWB */
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Diego Biurrun