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x264enc: parameterize libx264 provided NAL layout in codec-data creation

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This commit is contained in:
Mark Nauwelaerts 2010-04-13 13:16:41 +02:00
parent 02be555df3
commit 5fd1796fda
1 changed files with 18 additions and 14 deletions
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32
ext/x264/gstx264enc.c
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@ -717,6 +717,10 @@ gst_x264_enc_header_buf (GstX264Enc * encoder)
guint8 *buffer, *sps; guint8 *buffer, *sps;
gulong buffer_size; gulong buffer_size;
#define SEI_NI 0
#define SPS_NI 1
#define PPS_NI 2
if (G_UNLIKELY (encoder->x264enc == NULL)) if (G_UNLIKELY (encoder->x264enc == NULL))
return NULL; return NULL;
@ -731,27 +735,27 @@ gst_x264_enc_header_buf (GstX264Enc * encoder)
/* x264 is expected to return an SEI (some identification info), /* x264 is expected to return an SEI (some identification info),
* followed by an SPS and PPS */ * followed by an SPS and PPS */
if (i_nal != 3 || nal[1].i_type != 7 || nal[2].i_type != 8 || if (i_nal != 3 || nal[SPS_NI].i_type != 7 || nal[PPS_NI].i_type != 8 ||
nal[1].i_payload < 4 || nal[2].i_payload < 1) { nal[SPS_NI].i_payload < 4 || nal[PPS_NI].i_payload < 1) {
GST_ELEMENT_ERROR (encoder, STREAM, ENCODE, (NULL), GST_ELEMENT_ERROR (encoder, STREAM, ENCODE, (NULL),
("Unexpected x264 header.")); ("Unexpected x264 header."));
return NULL; return NULL;
} }
GST_MEMDUMP ("SEI", nal[0].p_payload, nal[0].i_payload); GST_MEMDUMP ("SEI", nal[SEI_NI].p_payload, nal[SEI_NI].i_payload);
GST_MEMDUMP ("SPS", nal[1].p_payload, nal[1].i_payload); GST_MEMDUMP ("SPS", nal[SPS_NI].p_payload, nal[SPS_NI].i_payload);
GST_MEMDUMP ("PPS", nal[2].p_payload, nal[2].i_payload); GST_MEMDUMP ("PPS", nal[PPS_NI].p_payload, nal[PPS_NI].i_payload);
/* nal payloads with emulation_prevention_three_byte, and some header data */ /* nal payloads with emulation_prevention_three_byte, and some header data */
buffer_size = (nal[1].i_payload + nal[2].i_payload) * 4 + 100; buffer_size = (nal[SPS_NI].i_payload + nal[PPS_NI].i_payload) * 4 + 100;
buffer = g_malloc (buffer_size); buffer = g_malloc (buffer_size);
/* old style API: nal's are not encapsulated, and have no sync/size prefix, /* old style API: nal's are not encapsulated, and have no sync/size prefix,
* new style API: nal's are encapsulated, and have 4-byte size prefix */ * new style API: nal's are encapsulated, and have 4-byte size prefix */
#ifndef X264_ENC_NALS #ifndef X264_ENC_NALS
sps = nal[1].p_payload; sps = nal[SPS_NI].p_payload;
#else #else
sps = nal[1].p_payload + 4; sps = nal[SPS_NI].p_payload + 4;
#endif #endif
buffer[0] = 1; /* AVC Decoder Configuration Record ver. 1 */ buffer[0] = 1; /* AVC Decoder Configuration Record ver. 1 */
@ -766,10 +770,10 @@ gst_x264_enc_header_buf (GstX264Enc * encoder)
#ifndef X264_ENC_NALS #ifndef X264_ENC_NALS
i_data = buffer_size - i_size - 2; i_data = buffer_size - i_size - 2;
nal_size = x264_nal_encode (buffer + i_size + 2, &i_data, 0, &nal[1]); nal_size = x264_nal_encode (buffer + i_size + 2, &i_data, 0, &nal[SPS_NI]);
#else #else
nal_size = nal[1].i_payload - 4; nal_size = nal[SPS_NI].i_payload - 4;
memcpy (buffer + i_size + 2, nal[1].p_payload + 4, nal_size); memcpy (buffer + i_size + 2, nal[SPS_NI].p_payload + 4, nal_size);
#endif #endif
GST_WRITE_UINT16_BE (buffer + i_size, nal_size); GST_WRITE_UINT16_BE (buffer + i_size, nal_size);
i_size += nal_size + 2; i_size += nal_size + 2;
@ -778,10 +782,10 @@ gst_x264_enc_header_buf (GstX264Enc * encoder)
#ifndef X264_ENC_NALS #ifndef X264_ENC_NALS
i_data = buffer_size - i_size - 2; i_data = buffer_size - i_size - 2;
nal_size = x264_nal_encode (buffer + i_size + 2, &i_data, 0, &nal[2]); nal_size = x264_nal_encode (buffer + i_size + 2, &i_data, 0, &nal[PPS_NI]);
#else #else
nal_size = nal[2].i_payload - 4; nal_size = nal[PPS_NI].i_payload - 4;
memcpy (buffer + i_size + 2, nal[2].p_payload + 4, nal_size); memcpy (buffer + i_size + 2, nal[PPS_NI].p_payload + 4, nal_size);
#endif #endif
GST_WRITE_UINT16_BE (buffer + i_size, nal_size); GST_WRITE_UINT16_BE (buffer + i_size, nal_size);
i_size += nal_size + 2; i_size += nal_size + 2;