min_partition_order, max_partition_order, lpc_type, lpc_passes.
Corresponding FLAC encoder options should be used instead.
- 2011-04-XX - bebe72f - lavu 51.1.0 - avutil.h
+2011-05-07 - xxxxxxx - lavfi 2.5.0 - avcodec.h
+ Add libavfilter/avcodec.h header and avfilter_copy_frame_props()
+ function.
+
+2011-05-07 - xxxxxxx - lavc 53.5.0 - AVFrame
+ Add format field to AVFrame.
+
+2011-05-07 - xxxxxxx - lavc 53.4.0 - AVFrame
+ Add width and height fields to AVFrame.
+
+2011-05-01 - xxxxxxx - lavfi 2.4.0 - avfilter.h
+ Rename AVFilterBufferRefVideoProps.pixel_aspect to
+ sample_aspect_ratio.
+
+2011-05-01 - xxxxxxx - lavc 53.3.0 - AVFrame
+ Add a sample_aspect_ratio field to AVFrame.
+
+2011-05-01 - xxxxxxx - lavc 53.2.0 - AVFrame
+ Add a pkt_pos field to AVFrame.
+
+2011-04-xx - xxxxxxx - lavu 51.2.0 - mem.h
+ Add av_dynarray_add function for adding
+ an element to a dynamic array.
+
+ 2011-04-26 - bebe72f - lavu 51.1.0 - avutil.h
Add AVPictureType enum and av_get_picture_type_char(), deprecate
FF_*_TYPE defines and av_get_pict_type_char() defined in
libavcodec/avcodec.h.
--- /dev/null
- * This file is part of Libav.
+ /*
+ * SMPTE 302M decoder
+ * Copyright (c) 2008 Laurent Aimar <fenrir@videolan.org>
+ * Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com>
+ *
- * Libav is free software; you can redistribute it and/or
++ * This file is part of FFmpeg.
+ *
- * Libav is distributed in the hope that it will be useful,
++ * 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.
+ *
- * License along with Libav; if not, write to the Free Software
++ * 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 "libavutil/intreadwrite.h"
+ #include "avcodec.h"
+
+ #define AES3_HEADER_LEN 4
+
+ static int s302m_parse_frame_header(AVCodecContext *avctx, const uint8_t *buf,
+ int buf_size)
+ {
+ uint32_t h;
+ int frame_size, channels, id, bits;
+
+ if (buf_size <= AES3_HEADER_LEN) {
+ av_log(avctx, AV_LOG_ERROR, "frame is too short\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ /*
+ * AES3 header :
+ * size: 16
+ * number channels 2
+ * channel_id 8
+ * bits per samples 2
+ * alignments 4
+ */
+
+ h = AV_RB32(buf);
+ frame_size = (h >> 16) & 0xffff;
+ channels = ((h >> 14) & 0x0003) * 2 + 2;
+ id = (h >> 6) & 0x00ff;
+ bits = ((h >> 4) & 0x0003) * 4 + 16;
+
+ if (AES3_HEADER_LEN + frame_size != buf_size || bits > 24) {
+ av_log(avctx, AV_LOG_ERROR, "frame has invalid header\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* Set output properties */
+ avctx->bits_per_coded_sample = bits;
+ if (bits > 16)
+ avctx->sample_fmt = SAMPLE_FMT_S32;
+ else
+ avctx->sample_fmt = SAMPLE_FMT_S16;
+
+ avctx->channels = channels;
+ avctx->sample_rate = 48000;
+ avctx->bit_rate = 48000 * avctx->channels * (avctx->bits_per_coded_sample + 4) +
+ 32 * (48000 / (buf_size * 8 /
+ (avctx->channels *
+ (avctx->bits_per_coded_sample + 4))));
+
+ return frame_size;
+ }
+
+ static int s302m_decode_frame(AVCodecContext *avctx, void *data,
+ int *data_size, AVPacket *avpkt)
+ {
+ const uint8_t *buf = avpkt->data;
+ int buf_size = avpkt->size;
+
+ int frame_size = s302m_parse_frame_header(avctx, buf, buf_size);
+ if (frame_size < 0)
+ return frame_size;
+
+ buf_size -= AES3_HEADER_LEN;
+ buf += AES3_HEADER_LEN;
+
+ if (*data_size < 4 * buf_size * 8 / (avctx->bits_per_coded_sample + 4))
+ return -1;
+
+ if (avctx->bits_per_coded_sample == 24) {
+ uint32_t *o = data;
+ for (; buf_size > 6; buf_size -= 7) {
+ *o++ = (av_reverse[buf[2]] << 24) |
+ (av_reverse[buf[1]] << 16) |
+ (av_reverse[buf[0]] << 8);
+ *o++ = (av_reverse[buf[6] & 0xf0] << 28) |
+ (av_reverse[buf[5]] << 20) |
+ (av_reverse[buf[4]] << 12) |
+ (av_reverse[buf[3] & 0x0f] << 8);
+ buf += 7;
+ }
+ *data_size = (uint8_t*) o - (uint8_t*) data;
+ } else if (avctx->bits_per_coded_sample == 20) {
+ uint32_t *o = data;
+ for (; buf_size > 5; buf_size -= 6) {
+ *o++ = (av_reverse[buf[2] & 0xf0] << 28) |
+ (av_reverse[buf[1]] << 20) |
+ (av_reverse[buf[0]] << 12);
+ *o++ = (av_reverse[buf[5] & 0xf0] << 28) |
+ (av_reverse[buf[4]] << 20) |
+ (av_reverse[buf[3]] << 12);
+ buf += 6;
+ }
+ *data_size = (uint8_t*) o - (uint8_t*) data;
+ } else {
+ uint16_t *o = data;
+ for (; buf_size > 4; buf_size -= 5) {
+ *o++ = (av_reverse[buf[1]] << 8) |
+ av_reverse[buf[0]];
+ *o++ = (av_reverse[buf[4] & 0xf0] << 12) |
+ (av_reverse[buf[3]] << 4) |
+ av_reverse[buf[2] & 0x0f];
+ buf += 5;
+ }
+ *data_size = (uint8_t*) o - (uint8_t*) data;
+ }
+
+ return buf - avpkt->data;
+ }
+
+
+ AVCodec ff_s302m_decoder = {
+ .name = "s302m",
+ .type = AVMEDIA_TYPE_AUDIO,
+ .id = CODEC_ID_S302M,
+ .priv_data_size = 0,
+ .decode = s302m_decode_frame,
+ .long_name = NULL_IF_CONFIG_SMALL("SMPTE 302M"),
+ };
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