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@@ -0,0 +1,127 @@
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+/*
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+ * AMR Audio encoder stub
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+ * Copyright (c) 2003 the ffmpeg project
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+ *
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+ * This file is part of Libav.
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+ *
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+ * Libav 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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+ * Libav 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 Libav; 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 <vo-amrwbenc/enc_if.h>
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+
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+#include "avcodec.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, "
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+ "18.25k, 19.85k, 23.05k, or 23.85k\n";
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+
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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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+ void *state;
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+ int mode;
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+ int allow_dtx;
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+} AMRWBContext;
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+
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+static int getWBBitrateMode(int bitrate)
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+{
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+ /* make the correspondance between bitrate and mode */
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+ AMRWB_bitrates rates[] = { { 6600, 0},
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+ { 8850, 1},
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+ {12650, 2},
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+ {14250, 3},
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+ {15850, 4},
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+ {18250, 5},
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+ {19850, 6},
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+ {23050, 7},
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+ {23850, 8}, };
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+ int i;
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+
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+ for (i = 0; i < 9; 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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+static av_cold int amr_wb_encode_init(AVCodecContext *avctx)
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+{
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+ AMRWBContext *s = avctx->priv_data;
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+
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+ if (avctx->sample_rate != 16000) {
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+ av_log(avctx, AV_LOG_ERROR, "Only 16000Hz 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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+ if ((s->mode = getWBBitrateMode(avctx->bit_rate)) < 0) {
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+ av_log(avctx, AV_LOG_ERROR, wb_bitrate_unsupported);
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+ return -1;
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+ }
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+
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+ avctx->frame_size = 320;
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+ avctx->coded_frame = avcodec_alloc_frame();
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+
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+ s->state = E_IF_init();
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+ s->allow_dtx = 0;
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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_encode_close(AVCodecContext *avctx)
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+{
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+ AMRWBContext *s = avctx->priv_data;
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+
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+ E_IF_exit(s->state);
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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_wb_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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+ AMRWBContext *s = avctx->priv_data;
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+ int size;
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+
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+ if ((s->mode = getWBBitrateMode(avctx->bit_rate)) < 0) {
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+ av_log(avctx, AV_LOG_ERROR, wb_bitrate_unsupported);
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+ return -1;
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+ }
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+ size = E_IF_encode(s->state, s->mode, data, frame, s->allow_dtx);
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+ return size;
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+}
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+
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+AVCodec ff_libvo_amrwbenc_encoder = {
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+ "libvo_amrwbenc",
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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_encode_init,
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+ amr_wb_encode_frame,
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+ amr_wb_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("libvo-amrwbenc Adaptive Multi-Rate "
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+ "(AMR) Wide-Band"),
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+};
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+
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Martin Storsjö