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avformat/spdifenc: make hd_buf an array

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This is preparation for adding a second hd_buf in a followup commit.

Also, slightly improve the comments for hd_buf_x members to clarify
which ones are actually used and kept up-to-date depending on which
codec is being muxed.
This commit is contained in:
Anssi Hannula 2020-02-20 21:49:50 +02:00
parent a07b19d9af
commit 1d5338e450
1 changed files with 24 additions and 24 deletions
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48
libavformat/spdifenc.c
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@ -69,10 +69,10 @@ typedef struct IEC61937Context {
int use_preamble; ///< preamble enabled (disabled for exactly pre-padded DTS)
int extra_bswap; ///< extra bswap for payload (for LE DTS => standard BE DTS)
uint8_t *hd_buf; ///< allocated buffer to concatenate hd audio frames
int hd_buf_size; ///< size of the hd audio buffer
int hd_buf_count; ///< number of frames in the hd audio buffer
int hd_buf_filled; ///< amount of bytes in the hd audio buffer
uint8_t *hd_buf[1]; ///< allocated buffer to concatenate hd audio frames
int hd_buf_size; ///< size of the hd audio buffer (eac3, dts4)
int hd_buf_count; ///< number of frames in the hd audio buffer (eac3, truehd)
int hd_buf_filled; ///< amount of bytes in the hd audio buffer (eac3)
int dtshd_skip; ///< counter used for skipping DTS-HD frames
@ -122,11 +122,11 @@ static int spdif_header_eac3(AVFormatContext *s, AVPacket *pkt)
if (bsid > 10 && (pkt->data[4] & 0xc0) != 0xc0) /* fscod */
repeat = eac3_repeat[(pkt->data[4] & 0x30) >> 4]; /* numblkscod */
ctx->hd_buf = av_fast_realloc(ctx->hd_buf, &ctx->hd_buf_size, ctx->hd_buf_filled + pkt->size);
if (!ctx->hd_buf)
ctx->hd_buf[0] = av_fast_realloc(ctx->hd_buf[0], &ctx->hd_buf_size, ctx->hd_buf_filled + pkt->size);
if (!ctx->hd_buf[0])
return AVERROR(ENOMEM);
memcpy(&ctx->hd_buf[ctx->hd_buf_filled], pkt->data, pkt->size);
memcpy(&ctx->hd_buf[0][ctx->hd_buf_filled], pkt->data, pkt->size);
ctx->hd_buf_filled += pkt->size;
if (++ctx->hd_buf_count < repeat){
@ -135,7 +135,7 @@ static int spdif_header_eac3(AVFormatContext *s, AVPacket *pkt)
}
ctx->data_type = IEC61937_EAC3;
ctx->pkt_offset = 24576;
ctx->out_buf = ctx->hd_buf;
ctx->out_buf = ctx->hd_buf[0];
ctx->out_bytes = ctx->hd_buf_filled;
ctx->length_code = ctx->hd_buf_filled;
@ -228,15 +228,15 @@ static int spdif_header_dts4(AVFormatContext *s, AVPacket *pkt, int core_size,
* 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)
av_fast_malloc(&ctx->hd_buf[0], &ctx->hd_buf_size, ctx->out_bytes);
if (!ctx->hd_buf[0])
return AVERROR(ENOMEM);
ctx->out_buf = ctx->hd_buf;
ctx->out_buf = ctx->hd_buf[0];
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);
memcpy(ctx->hd_buf[0], dtshd_start_code, sizeof(dtshd_start_code));
AV_WB16(ctx->hd_buf[0] + sizeof(dtshd_start_code), pkt_size);
memcpy(ctx->hd_buf[0] + sizeof(dtshd_start_code) + 2, pkt->data, pkt_size);
return 0;
}
@ -403,12 +403,12 @@ static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
if (!ctx->hd_buf_count) {
static const char mat_start_code[20] = { 0x07, 0x9E, 0x00, 0x03, 0x84, 0x01, 0x01, 0x01, 0x80, 0x00, 0x56, 0xA5, 0x3B, 0xF4, 0x81, 0x83, 0x49, 0x80, 0x77, 0xE0 };
mat_code_length = sizeof(mat_start_code) + BURST_HEADER_SIZE;
memcpy(ctx->hd_buf, mat_start_code, sizeof(mat_start_code));
memcpy(ctx->hd_buf[0], mat_start_code, sizeof(mat_start_code));
} else if (ctx->hd_buf_count == 12) {
static const char mat_middle_code[12] = { 0xC3, 0xC1, 0x42, 0x49, 0x3B, 0xFA, 0x82, 0x83, 0x49, 0x80, 0x77, 0xE0 };
mat_code_length = sizeof(mat_middle_code) + MAT_MIDDLE_CODE_OFFSET;
memcpy(&ctx->hd_buf[12 * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + MAT_MIDDLE_CODE_OFFSET],
memcpy(&ctx->hd_buf[0][12 * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + MAT_MIDDLE_CODE_OFFSET],
mat_middle_code, sizeof(mat_middle_code));
}
@ -420,26 +420,26 @@ static int spdif_header_truehd(AVFormatContext *s, AVPacket *pkt)
return AVERROR_PATCHWELCOME;
}
memcpy(&ctx->hd_buf[ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length],
memcpy(&ctx->hd_buf[0][ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length],
pkt->data, pkt->size);
if (ctx->hd_buf_count < 23) {
memset(&ctx->hd_buf[ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length + pkt->size],
memset(&ctx->hd_buf[0][ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + mat_code_length + pkt->size],
0, TRUEHD_FRAME_OFFSET - pkt->size - mat_code_length);
} else {
size_t padding = MAT_FRAME_SIZE - (ctx->hd_buf_count * TRUEHD_FRAME_OFFSET - BURST_HEADER_SIZE + pkt->size);
memset(&ctx->hd_buf[MAT_FRAME_SIZE - padding], 0, padding);
memset(&ctx->hd_buf[0][MAT_FRAME_SIZE - padding], 0, padding);
}
if (++ctx->hd_buf_count < 24){
ctx->pkt_offset = 0;
return 0;
}
memcpy(&ctx->hd_buf[MAT_FRAME_SIZE - sizeof(mat_end_code)], mat_end_code, sizeof(mat_end_code));
memcpy(&ctx->hd_buf[0][MAT_FRAME_SIZE - sizeof(mat_end_code)], mat_end_code, sizeof(mat_end_code));
ctx->hd_buf_count = 0;
ctx->data_type = IEC61937_TRUEHD;
ctx->pkt_offset = 61440;
ctx->out_buf = ctx->hd_buf;
ctx->out_buf = ctx->hd_buf[0];
ctx->out_bytes = MAT_FRAME_SIZE;
ctx->length_code = MAT_FRAME_SIZE;
return 0;
@ -470,8 +470,8 @@ static int spdif_write_header(AVFormatContext *s)
case AV_CODEC_ID_TRUEHD:
case AV_CODEC_ID_MLP:
ctx->header_info = spdif_header_truehd;
ctx->hd_buf = av_malloc(MAT_FRAME_SIZE);
if (!ctx->hd_buf)
ctx->hd_buf[0] = av_malloc(MAT_FRAME_SIZE);
if (!ctx->hd_buf[0])
return AVERROR(ENOMEM);
break;
default:
@ -486,7 +486,7 @@ static void spdif_deinit(AVFormatContext *s)
{
IEC61937Context *ctx = s->priv_data;
av_freep(&ctx->buffer);
av_freep(&ctx->hd_buf);
av_freep(&ctx->hd_buf[0]);
}
static av_always_inline void spdif_put_16(IEC61937Context *ctx,