making act segmenter

1 files changed, 128 insertions, 0 deletions

diff --git a/ffmpeg/libavcodec/gsmdec.c b/ffmpeg/libavcodec/gsmdec.c
new file mode 100644
index 0000000..dc64267
--- /dev/null
+++ b/ffmpeg/libavcodec/gsmdec.c
@@ -0,0 +1,128 @@
+/*
+ * gsm 06.10 decoder
+ * Copyright (c) 2010 Reimar Döffinger <Reimar.Doeffinger@gmx.de>
+ *
+ * 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
+ */
+
+/**
+ * @file
+ * GSM decoder
+ */
+
+#include "libavutil/channel_layout.h"
+#include "avcodec.h"
+#include "get_bits.h"
+#include "internal.h"
+#include "msgsmdec.h"
+
+#include "gsmdec_template.c"
+
+static av_cold int gsm_init(AVCodecContext *avctx)
+{
+    avctx->channels       = 1;
+    avctx->channel_layout = AV_CH_LAYOUT_MONO;
+    if (!avctx->sample_rate)
+        avctx->sample_rate = 8000;
+    avctx->sample_fmt     = AV_SAMPLE_FMT_S16;
+
+    switch (avctx->codec_id) {
+    case AV_CODEC_ID_GSM:
+        avctx->frame_size  = GSM_FRAME_SIZE;
+        avctx->block_align = GSM_BLOCK_SIZE;
+        break;
+    case AV_CODEC_ID_GSM_MS:
+        avctx->frame_size  = 2 * GSM_FRAME_SIZE;
+        avctx->block_align = GSM_MS_BLOCK_SIZE;
+    }
+
+    return 0;
+}
+
+static int gsm_decode_frame(AVCodecContext *avctx, void *data,
+                            int *got_frame_ptr, AVPacket *avpkt)
+{
+    AVFrame *frame = data;
+    int res;
+    GetBitContext gb;
+    const uint8_t *buf = avpkt->data;
+    int buf_size = avpkt->size;
+    int16_t *samples;
+
+    if (buf_size < avctx->block_align) {
+        av_log(avctx, AV_LOG_ERROR, "Packet is too small\n");
+        return AVERROR_INVALIDDATA;
+    }
+
+    /* get output buffer */
+    frame->nb_samples = avctx->frame_size;
+    if ((res = ff_get_buffer(avctx, frame, 0)) < 0)
+        return res;
+    samples = (int16_t *)frame->data[0];
+
+    switch (avctx->codec_id) {
+    case AV_CODEC_ID_GSM:
+        init_get_bits(&gb, buf, buf_size * 8);
+        if (get_bits(&gb, 4) != 0xd)
+            av_log(avctx, AV_LOG_WARNING, "Missing GSM magic!\n");
+        res = gsm_decode_block(avctx, samples, &gb);
+        if (res < 0)
+            return res;
+        break;
+    case AV_CODEC_ID_GSM_MS:
+        res = ff_msgsm_decode_block(avctx, samples, buf);
+        if (res < 0)
+            return res;
+    }
+
+    *got_frame_ptr = 1;
+
+    return avctx->block_align;
+}
+
+static void gsm_flush(AVCodecContext *avctx)
+{
+    GSMContext *s = avctx->priv_data;
+    memset(s, 0, sizeof(*s));
+}
+
+#if CONFIG_GSM_DECODER
+AVCodec ff_gsm_decoder = {
+    .name           = "gsm",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_GSM,
+    .priv_data_size = sizeof(GSMContext),
+    .init           = gsm_init,
+    .decode         = gsm_decode_frame,
+    .flush          = gsm_flush,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("GSM"),
+};
+#endif
+#if CONFIG_GSM_MS_DECODER
+AVCodec ff_gsm_ms_decoder = {
+    .name           = "gsm_ms",
+    .type           = AVMEDIA_TYPE_AUDIO,
+    .id             = AV_CODEC_ID_GSM_MS,
+    .priv_data_size = sizeof(GSMContext),
+    .init           = gsm_init,
+    .decode         = gsm_decode_frame,
+    .flush          = gsm_flush,
+    .capabilities   = CODEC_CAP_DR1,
+    .long_name      = NULL_IF_CONFIG_SMALL("GSM Microsoft variant"),
+};
+#endif