* Copyright (c) 2010 Anssi Hannula
* Copyright (c) 2010 Carl Eugen Hoyos
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav 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,
+ * Libav 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
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
* dependent from data-type (spaces between packets are filled by zeros)
*/
+#include <inttypes.h>
+
#include "avformat.h"
+#include "avio_internal.h"
#include "spdif.h"
#include "libavcodec/ac3.h"
#include "libavcodec/dca.h"
+#include "libavcodec/dca_syncwords.h"
#include "libavcodec/aacadtsdec.h"
+#include "libavutil/opt.h"
typedef struct IEC61937Context {
+ const AVClass *av_class;
enum IEC61937DataType data_type;///< burst info - reference to type of payload of the data-burst
int length_code; ///< length code in bits or bytes, depending on data type
int pkt_offset; ///< data burst repetition period in bytes
int hd_buf_count; ///< number of frames in the hd audio buffer
int hd_buf_filled; ///< amount of bytes in the hd audio buffer
+ int dtshd_skip; ///< counter used for skipping DTS-HD frames
+
+ /* AVOptions: */
+ int dtshd_rate;
+ int dtshd_fallback;
+#define SPDIF_FLAG_BIGENDIAN 0x01
+ int spdif_flags;
+
/// function, which generates codec dependent header information.
/// Sets data_type and pkt_offset, and length_code, out_bytes, out_buf if necessary
int (*header_info) (AVFormatContext *s, AVPacket *pkt);
} IEC61937Context;
+static const AVOption options[] = {
+{ "spdif_flags", "IEC 61937 encapsulation flags", offsetof(IEC61937Context, spdif_flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
+{ "be", "output in big-endian format (for use as s16be)", 0, AV_OPT_TYPE_CONST, {.i64 = SPDIF_FLAG_BIGENDIAN}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "spdif_flags" },
+{ "dtshd_rate", "mux complete DTS frames in HD mode at the specified IEC958 rate (in Hz, default 0=disabled)", offsetof(IEC61937Context, dtshd_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 768000, AV_OPT_FLAG_ENCODING_PARAM },
+{ "dtshd_fallback_time", "min secs to strip HD for after an overflow (-1: till the end, default 60)", offsetof(IEC61937Context, dtshd_fallback), AV_OPT_TYPE_INT, {.i64 = 60}, -1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
+{ NULL },
+};
+
+static const AVClass class = {
+ .class_name = "spdif",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
static int spdif_header_ac3(AVFormatContext *s, AVPacket *pkt)
{
return 0;
}
+/*
+ * DTS type IV (DTS-HD) can be transmitted with various frame repetition
+ * periods; longer repetition periods allow for longer packets and therefore
+ * higher bitrate. Longer repetition periods mean that the constant bitrate of
+ * the outputted IEC 61937 stream is higher.
+ * The repetition period is measured in IEC 60958 frames (4 bytes).
+ */
+static int spdif_dts4_subtype(int period)
+{
+ switch (period) {
+ case 512: return 0x0;
+ case 1024: return 0x1;
+ case 2048: return 0x2;
+ case 4096: return 0x3;
+ case 8192: return 0x4;
+ case 16384: return 0x5;
+ }
+ return -1;
+}
+
+static int spdif_header_dts4(AVFormatContext *s, AVPacket *pkt, int core_size,
+ int sample_rate, int blocks)
+{
+ IEC61937Context *ctx = s->priv_data;
+ static const char dtshd_start_code[10] = { 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe };
+ int pkt_size = pkt->size;
+ int period;
+ int subtype;
+
+ if (!core_size) {
+ av_log(s, AV_LOG_ERROR, "HD mode not supported for this format\n");
+ return AVERROR(EINVAL);
+ }
+
+ if (!sample_rate) {
+ av_log(s, AV_LOG_ERROR, "Unknown DTS sample rate for HD\n");
+ return AVERROR_INVALIDDATA;
+ }
+
+ period = ctx->dtshd_rate * (blocks << 5) / sample_rate;
+ subtype = spdif_dts4_subtype(period);
+
+ if (subtype < 0) {
+ av_log(s, AV_LOG_ERROR, "Specified HD rate of %d Hz would require an "
+ "impossible repetition period of %d for the current DTS stream"
+ " (blocks = %d, sample rate = %d)\n", ctx->dtshd_rate, period,
+ blocks << 5, sample_rate);
+ return AVERROR(EINVAL);
+ }
+
+ /* set pkt_offset and DTS IV subtype according to the requested output
+ * rate */
+ ctx->pkt_offset = period * 4;
+ ctx->data_type = IEC61937_DTSHD | subtype << 8;
+
+ /* If the bitrate is too high for transmitting at the selected
+ * repetition period setting, strip DTS-HD until a good amount
+ * of consecutive non-overflowing HD frames have been observed.
+ * This generally only happens if the caller is cramming a Master
+ * Audio stream into 192kHz IEC 60958 (which may or may not fit). */
+ if (sizeof(dtshd_start_code) + 2 + pkt_size
+ > ctx->pkt_offset - BURST_HEADER_SIZE && core_size) {
+ if (!ctx->dtshd_skip)
+ av_log(s, AV_LOG_WARNING, "DTS-HD bitrate too high, "
+ "temporarily sending core only\n");
+ if (ctx->dtshd_fallback > 0)
+ ctx->dtshd_skip = sample_rate * ctx->dtshd_fallback / (blocks << 5);
+ else
+ /* skip permanently (dtshd_fallback == -1) or just once
+ * (dtshd_fallback == 0) */
+ ctx->dtshd_skip = 1;
+ }
+ if (ctx->dtshd_skip && core_size) {
+ pkt_size = core_size;
+ if (ctx->dtshd_fallback >= 0)
+ --ctx->dtshd_skip;
+ }
+
+ ctx->out_bytes = sizeof(dtshd_start_code) + 2 + pkt_size;
+
+ /* Align so that (length_code & 0xf) == 0x8. This is reportedly needed
+ * with some receivers, but the exact requirement is unconfirmed. */
+ ctx->length_code = FFALIGN(ctx->out_bytes + 0x8, 0x10) - 0x8;
+
+ av_fast_malloc(&ctx->hd_buf, &ctx->hd_buf_size, ctx->out_bytes);
+ if (!ctx->hd_buf)
+ return AVERROR(ENOMEM);
+
+ ctx->out_buf = ctx->hd_buf;
+
+ memcpy(ctx->hd_buf, dtshd_start_code, sizeof(dtshd_start_code));
+ AV_WB16(ctx->hd_buf + sizeof(dtshd_start_code), pkt_size);
+ memcpy(ctx->hd_buf + sizeof(dtshd_start_code) + 2, pkt->data, pkt_size);
+
+ return 0;
+}
+
static int spdif_header_dts(AVFormatContext *s, AVPacket *pkt)
{
IEC61937Context *ctx = s->priv_data;
uint32_t syncword_dts = AV_RB32(pkt->data);
int blocks;
+ int sample_rate = 0;
+ int core_size = 0;
+
+ if (pkt->size < 9)
+ return AVERROR_INVALIDDATA;
switch (syncword_dts) {
- case DCA_MARKER_RAW_BE:
+ case DCA_SYNCWORD_CORE_BE:
blocks = (AV_RB16(pkt->data + 4) >> 2) & 0x7f;
+ core_size = ((AV_RB24(pkt->data + 5) >> 4) & 0x3fff) + 1;
+ sample_rate = avpriv_dca_sample_rates[(pkt->data[8] >> 2) & 0x0f];
break;
- case DCA_MARKER_RAW_LE:
+ case DCA_SYNCWORD_CORE_LE:
blocks = (AV_RL16(pkt->data + 4) >> 2) & 0x7f;
ctx->extra_bswap = 1;
break;
- case DCA_MARKER_14B_BE:
+ case DCA_SYNCWORD_CORE_14B_BE:
blocks =
(((pkt->data[5] & 0x07) << 4) | ((pkt->data[6] & 0x3f) >> 2));
break;
- case DCA_MARKER_14B_LE:
+ case DCA_SYNCWORD_CORE_14B_LE:
blocks =
(((pkt->data[4] & 0x07) << 4) | ((pkt->data[7] & 0x3f) >> 2));
ctx->extra_bswap = 1;
break;
+ case DCA_SYNCWORD_SUBSTREAM:
+ /* We only handle HD frames that are paired with core. However,
+ sometimes DTS-HD streams with core have a stray HD frame without
+ core in the beginning of the stream. */
+ av_log(s, AV_LOG_ERROR, "stray DTS-HD frame\n");
+ return AVERROR_INVALIDDATA;
default:
- av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%x\n", syncword_dts);
+ av_log(s, AV_LOG_ERROR, "bad DTS syncword 0x%"PRIx32"\n", syncword_dts);
return AVERROR_INVALIDDATA;
}
blocks++;
+
+ if (ctx->dtshd_rate)
+ /* DTS type IV output requested */
+ return spdif_header_dts4(s, pkt, core_size, sample_rate, blocks);
+
switch (blocks) {
case 512 >> 5: ctx->data_type = IEC61937_DTS1; break;
case 1024 >> 5: ctx->data_type = IEC61937_DTS2; break;
blocks << 5);
return AVERROR(ENOSYS);
}
+
+ /* discard extraneous data by default */
+ if (core_size && core_size < pkt->size) {
+ ctx->out_bytes = core_size;
+ ctx->length_code = core_size << 3;
+ }
+
ctx->pkt_offset = blocks << 7;
if (ctx->out_bytes == ctx->pkt_offset) {
* preamble as it would not fit in there. This is the case for dts
* discs and dts-in-wav. */
ctx->use_preamble = 0;
+ } else if (ctx->out_bytes > ctx->pkt_offset - BURST_HEADER_SIZE) {
+ avpriv_request_sample(s, "Unrecognized large DTS frame");
+ /* This will fail with a "bitrate too high" in the caller */
}
return 0;
ctx->data_type = mpeg_data_type [version & 1][layer];
ctx->pkt_offset = spdif_mpeg_pkt_offset[version & 1][layer];
}
- // TODO Data type dependant info (normal/karaoke, dynamic range control)
+ // TODO Data type dependent info (normal/karaoke, dynamic range control)
return 0;
}
int ret;
init_get_bits(&gbc, pkt->data, AAC_ADTS_HEADER_SIZE * 8);
- ret = ff_aac_parse_header(&gbc, &hdr);
+ ret = avpriv_aac_parse_header(&gbc, &hdr);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Wrong AAC file format\n");
return AVERROR_INVALIDDATA;
ctx->data_type = IEC61937_MPEG2_AAC_LSF_4096;
break;
default:
- av_log(s, AV_LOG_ERROR, "%i samples in AAC frame not supported\n",
- hdr.samples);
+ av_log(s, AV_LOG_ERROR,
+ "%"PRIu32" samples in AAC frame not supported\n", hdr.samples);
return AVERROR(EINVAL);
}
//TODO Data type dependent info (LC profile/SBR)
if (pkt->size > TRUEHD_FRAME_OFFSET - mat_code_length) {
/* if such frames exist, we'd need some more complex logic to
* distribute the TrueHD frames in the MAT frame */
- av_log(s, AV_LOG_ERROR, "TrueHD frame too big, %d bytes\n", pkt->size);
- av_log_ask_for_sample(s, NULL);
- return AVERROR_INVALIDDATA;
+ avpriv_request_sample(s, "Too large TrueHD frame of %d bytes",
+ pkt->size);
+ return AVERROR_PATCHWELCOME;
}
memcpy(&ctx->hd_buf[ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length],
IEC61937Context *ctx = s->priv_data;
switch (s->streams[0]->codec->codec_id) {
- case CODEC_ID_AC3:
+ case AV_CODEC_ID_AC3:
ctx->header_info = spdif_header_ac3;
break;
- case CODEC_ID_EAC3:
+ case AV_CODEC_ID_EAC3:
ctx->header_info = spdif_header_eac3;
break;
- case CODEC_ID_MP1:
- case CODEC_ID_MP2:
- case CODEC_ID_MP3:
+ case AV_CODEC_ID_MP1:
+ case AV_CODEC_ID_MP2:
+ case AV_CODEC_ID_MP3:
ctx->header_info = spdif_header_mpeg;
break;
- case CODEC_ID_DTS:
+ case AV_CODEC_ID_DTS:
ctx->header_info = spdif_header_dts;
break;
- case CODEC_ID_AAC:
+ case AV_CODEC_ID_AAC:
ctx->header_info = spdif_header_aac;
break;
- case CODEC_ID_TRUEHD:
+ case AV_CODEC_ID_TRUEHD:
ctx->header_info = spdif_header_truehd;
ctx->hd_buf = av_malloc(MAT_FRAME_SIZE);
if (!ctx->hd_buf)
return 0;
}
+static av_always_inline void spdif_put_16(IEC61937Context *ctx,
+ AVIOContext *pb, unsigned int val)
+{
+ if (ctx->spdif_flags & SPDIF_FLAG_BIGENDIAN)
+ avio_wb16(pb, val);
+ else
+ avio_wl16(pb, val);
+}
+
static int spdif_write_packet(struct AVFormatContext *s, AVPacket *pkt)
{
IEC61937Context *ctx = s->priv_data;
if (!ctx->pkt_offset)
return 0;
- padding = (ctx->pkt_offset - ctx->use_preamble * BURST_HEADER_SIZE - ctx->out_bytes) >> 1;
+ padding = (ctx->pkt_offset - ctx->use_preamble * BURST_HEADER_SIZE - ctx->out_bytes) & ~1;
if (padding < 0) {
av_log(s, AV_LOG_ERROR, "bitrate is too high\n");
return AVERROR(EINVAL);
}
if (ctx->use_preamble) {
- put_le16(s->pb, SYNCWORD1); //Pa
- put_le16(s->pb, SYNCWORD2); //Pb
- put_le16(s->pb, ctx->data_type); //Pc
- put_le16(s->pb, ctx->length_code);//Pd
+ spdif_put_16(ctx, s->pb, SYNCWORD1); //Pa
+ spdif_put_16(ctx, s->pb, SYNCWORD2); //Pb
+ spdif_put_16(ctx, s->pb, ctx->data_type); //Pc
+ spdif_put_16(ctx, s->pb, ctx->length_code);//Pd
}
- if (HAVE_BIGENDIAN ^ ctx->extra_bswap) {
- put_buffer(s->pb, ctx->out_buf, ctx->out_bytes & ~1);
+ if (ctx->extra_bswap ^ (ctx->spdif_flags & SPDIF_FLAG_BIGENDIAN)) {
+ avio_write(s->pb, ctx->out_buf, ctx->out_bytes & ~1);
} else {
av_fast_malloc(&ctx->buffer, &ctx->buffer_size, ctx->out_bytes + FF_INPUT_BUFFER_PADDING_SIZE);
if (!ctx->buffer)
return AVERROR(ENOMEM);
ff_spdif_bswap_buf16((uint16_t *)ctx->buffer, (uint16_t *)ctx->out_buf, ctx->out_bytes >> 1);
- put_buffer(s->pb, ctx->buffer, ctx->out_bytes & ~1);
+ avio_write(s->pb, ctx->buffer, ctx->out_bytes & ~1);
}
+ /* a final lone byte has to be MSB aligned */
if (ctx->out_bytes & 1)
- put_be16(s->pb, ctx->out_buf[ctx->out_bytes - 1]);
+ spdif_put_16(ctx, s->pb, ctx->out_buf[ctx->out_bytes - 1] << 8);
- for (; padding > 0; padding--)
- put_be16(s->pb, 0);
+ ffio_fill(s->pb, 0, padding);
av_log(s, AV_LOG_DEBUG, "type=%x len=%i pkt_offset=%i\n",
ctx->data_type, ctx->out_bytes, ctx->pkt_offset);
- put_flush_packet(s->pb);
return 0;
}
-AVOutputFormat spdif_muxer = {
- "spdif",
- NULL_IF_CONFIG_SMALL("IEC 61937 (used on S/PDIF - IEC958)"),
- NULL,
- "spdif",
- sizeof(IEC61937Context),
- CODEC_ID_AC3,
- CODEC_ID_NONE,
- spdif_write_header,
- spdif_write_packet,
- spdif_write_trailer,
+AVOutputFormat ff_spdif_muxer = {
+ .name = "spdif",
+ .long_name = NULL_IF_CONFIG_SMALL("IEC 61937 (used on S/PDIF - IEC958)"),
+ .extensions = "spdif",
+ .priv_data_size = sizeof(IEC61937Context),
+ .audio_codec = AV_CODEC_ID_AC3,
+ .video_codec = AV_CODEC_ID_NONE,
+ .write_header = spdif_write_header,
+ .write_packet = spdif_write_packet,
+ .write_trailer = spdif_write_trailer,
+ .flags = AVFMT_NOTIMESTAMPS,
+ .priv_class = &class,
};