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lavf/latmenc: use a local simplified copy of avpriv_copy_bits()

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This is the only place in lavf where avpriv_copy_bits() is used, so this
allows us to make avpriv_copy_bits() lavc-local.
This commit is contained in:
Anton Khirnov 2020-10-26 13:16:38 +01:00
parent 2068ad5914
commit 886c601a70
1 changed files with 15 additions and 4 deletions
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19
libavformat/latmenc.c
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@ -101,6 +101,17 @@ static int latm_write_header(AVFormatContext *s)
return 0;
}
static void copy_bits(PutBitContext *pb, const uint8_t *src, int length)
{
int words = length >> 4;
int bits = length & 15;
int i;
for (i = 0; i < words; i++)
put_bits(pb, 16, AV_RB16(src + 2 * i));
if (bits)
put_bits(pb, bits, AV_RB16(src + 2 * words) >> (16 - bits));
}
static void latm_write_frame_header(AVFormatContext *s, PutBitContext *bs)
{
LATMContext *ctx = s->priv_data;
@ -121,11 +132,11 @@ static void latm_write_frame_header(AVFormatContext *s, PutBitContext *bs)
/* AudioSpecificConfig */
if (ctx->object_type == AOT_ALS) {
header_size = (par->extradata_size - (ctx->off >> 3)) * 8;
avpriv_copy_bits(bs, &par->extradata[ctx->off >> 3], header_size);
copy_bits(bs, &par->extradata[ctx->off >> 3], header_size);
} else {
// + 3 assumes not scalable and dependsOnCoreCoder == 0,
// see decode_ga_specific_config in libavcodec/aacdec.c
avpriv_copy_bits(bs, par->extradata, ctx->off + 3);
copy_bits(bs, par->extradata, ctx->off + 3);
if (!ctx->channel_conf) {
GetBitContext gb;
@ -207,9 +218,9 @@ static int latm_write_packet(AVFormatContext *s, AVPacket *pkt)
// This allows us to remux our FATE AAC samples into latm
// files that are still playable with minimal effort.
put_bits(&bs, 8, pkt->data[0] & 0xfe);
avpriv_copy_bits(&bs, pkt->data + 1, 8*pkt->size - 8);
copy_bits(&bs, pkt->data + 1, 8*pkt->size - 8);
} else
avpriv_copy_bits(&bs, pkt->data, 8*pkt->size);
copy_bits(&bs, pkt->data, 8*pkt->size);
flush_put_bits(&bs);