adding ffmpeg specific version

1 files changed, 152 insertions, 0 deletions

diff --git a/ffmpeg1/libavcodec/libvo-amrwbenc.c b/ffmpeg1/libavcodec/libvo-amrwbenc.c
new file mode 100644
index 0000000..a068cd0
--- /dev/null
+++ b/ffmpeg1/libavcodec/libvo-amrwbenc.c
@@ -0,0 +1,152 @@
+/*
+ * AMR Audio encoder 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 <vo-amrwbenc/enc_if.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "libavutil/avstring.h"
+#include "libavutil/internal.h"
+#include "libavutil/mem.h"
+#include "libavutil/opt.h"
+#include "avcodec.h"
+#include "internal.h"
+
+#define MAX_PACKET_SIZE  (1 + (477 + 7) / 8)
+
+typedef struct AMRWBContext {
+    AVClass *av_class;
+    void  *state;
+    int    mode;
+    int    last_bitrate;
+    int    allow_dtx;
+} AMRWBContext;
+
+static const AVOption options[] = {
+    { "dtx", "Allow DTX (generate comfort noise)", offsetof(AMRWBContext, allow_dtx), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM },
+    { NULL }
+};
+
+static const AVClass class = {
+    "libvo_amrwbenc", av_default_item_name, options, LIBAVUTIL_VERSION_INT
+};
+
+static int get_wb_bitrate_mode(int bitrate, void *log_ctx)
+{
+    /* make the correspondance between bitrate and mode */
+    static const int rates[] = {  6600,  8850, 12650, 14250, 15850, 18250,
+                                 19850, 23050, 23850 };
+    int i, best = -1, min_diff = 0;
+    char log_buf[200];
+
+    for (i = 0; i < 9; i++) {
+        if (rates[i] == bitrate)
+            return i;
+        if (best < 0 || abs(rates[i] - bitrate) < min_diff) {
+            best     = i;
+            min_diff = abs(rates[i] - bitrate);
+        }
+    }
+    /* no bitrate matching exactly, log a warning */
+    snprintf(log_buf, sizeof(log_buf), "bitrate not supported: use one of ");
+    for (i = 0; i < 9; i++)
+        av_strlcatf(log_buf, sizeof(log_buf), "%.2fk, ", rates[i]    / 1000.f);
+    av_strlcatf(log_buf, sizeof(log_buf), "using %.2fk", rates[best] / 1000.f);
+    av_log(log_ctx, AV_LOG_WARNING, "%s\n", log_buf);
+
+    return best;
+}
+
+static av_cold int amr_wb_encode_init(AVCodecContext *avctx)
+{
+    AMRWBContext *s = avctx->priv_data;
+
+    if (avctx->sample_rate != 16000 && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
+        av_log(avctx, AV_LOG_ERROR, "Only 16000Hz sample rate supported\n");
+        return AVERROR(ENOSYS);
+    }
+
+    if (avctx->channels != 1) {
+        av_log(avctx, AV_LOG_ERROR, "Only mono supported\n");
+        return AVERROR(ENOSYS);
+    }
+
+    s->mode            = get_wb_bitrate_mode(avctx->bit_rate, avctx);
+    s->last_bitrate    = avctx->bit_rate;
+
+    avctx->frame_size  = 320;
+    avctx->delay       =  80;
+
+    s->state     = E_IF_init();
+
+    return 0;
+}
+
+static int amr_wb_encode_close(AVCodecContext *avctx)
+{
+    AMRWBContext *s = avctx->priv_data;
+
+    E_IF_exit(s->state);
+    return 0;
+}
+
+static int amr_wb_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
+                               const AVFrame *frame, int *got_packet_ptr)
+{
+    AMRWBContext *s = avctx->priv_data;
+    const int16_t *samples = (const int16_t *)frame->data[0];
+    int size, ret;
+
+    if ((ret = ff_alloc_packet2(avctx, avpkt, MAX_PACKET_SIZE)) < 0)
+        return ret;
+
+    if (s->last_bitrate != avctx->bit_rate) {
+        s->mode         = get_wb_bitrate_mode(avctx->bit_rate, avctx);
+        s->last_bitrate = avctx->bit_rate;
+    }
+    size = E_IF_encode(s->state, s->mode, samples, avpkt->data, s->allow_dtx);
+    if (size <= 0 || size > MAX_PACKET_SIZE) {
+        av_log(avctx, AV_LOG_ERROR, "Error encoding frame\n");
+        return AVERROR(EINVAL);
+    }
+
+    if (frame->pts != AV_NOPTS_VALUE)
+        avpkt->pts = frame->pts - ff_samples_to_time_base(avctx, avctx->delay);
+
+    avpkt->size = size;
+    *got_packet_ptr = 1;
+    return 0;
+}
+
+AVCodec ff_libvo_amrwbenc_encoder = {
+    .name           = "libvo_amrwbenc",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_AMR_WB,
+    .priv_data_size = sizeof(AMRWBContext),
+    .init           = amr_wb_encode_init,
+    .encode2        = amr_wb_encode_frame,
+    .close          = amr_wb_encode_close,
+    .sample_fmts    = (const enum AVSampleFormat[]){ AV_SAMPLE_FMT_S16,
+                                                     AV_SAMPLE_FMT_NONE },
+    .long_name      = NULL_IF_CONFIG_SMALL("Android VisualOn AMR-WB "
+                                           "(Adaptive Multi-Rate Wide-Band)"),
+    .priv_class     = &class,
+};