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Split codec_id reading

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Receive codec id and convert it to AVCodecID separately.

This will allow the caller to distinguish between EOS and unknown codec
id.
This commit is contained in:
Romain Vimont 2023-02-10 18:48:20 +01:00
parent 230b8274b9
commit 953edfd1df
1 changed files with 20 additions and 9 deletions
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29
app/src/demuxer.c
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@ -18,17 +18,10 @@
#define SC_PACKET_PTS_MASK (SC_PACKET_FLAG_KEY_FRAME - 1)
static enum AVCodecID
sc_demuxer_recv_codec_id(struct sc_demuxer *demuxer) {
uint8_t data[4];
ssize_t r = net_recv_all(demuxer->socket, data, 4);
if (r < 4) {
return AV_CODEC_ID_NONE;
}
sc_demuxer_to_avcodec_id(uint32_t codec_id) {
#define SC_CODEC_ID_H264 UINT32_C(0x68323634) // "h264" in ASCII
#define SC_CODEC_ID_H265 UINT32_C(0x68323635) // "h265" in ASCII
#define SC_CODEC_ID_AV1 UINT32_C(0x00617631) // "av1" in ASCII
uint32_t codec_id = sc_read32be(data);
switch (codec_id) {
case SC_CODEC_ID_H264:
return AV_CODEC_ID_H264;
@ -42,6 +35,18 @@ sc_demuxer_recv_codec_id(struct sc_demuxer *demuxer) {
}
}
static bool
sc_demuxer_recv_codec_id(struct sc_demuxer *demuxer, uint32_t *codec_id) {
uint8_t data[4];
ssize_t r = net_recv_all(demuxer->socket, data, 4);
if (r < 4) {
return false;
}
*codec_id = sc_read32be(data);
return true;
}
static bool
sc_demuxer_recv_packet(struct sc_demuxer *demuxer, AVPacket *packet) {
// The video stream contains raw packets, without time information. When we
@ -196,7 +201,13 @@ static int
run_demuxer(void *data) {
struct sc_demuxer *demuxer = data;
enum AVCodecID codec_id = sc_demuxer_recv_codec_id(demuxer);
uint32_t raw_codec_id;
bool ok = sc_demuxer_recv_codec_id(demuxer, &raw_codec_id);
if (!ok) {
goto end;
}
enum AVCodecID codec_id = sc_demuxer_to_avcodec_id(raw_codec_id);
if (codec_id == AV_CODEC_ID_NONE) {
// Error already logged
goto end;