175 bitstream_start(bitstream *bs)  in bitstream_start()  argument
177     bs->max_size_in_dword = BITSTREAM_ALLOCATE_STEPPING;  in bitstream_start()
178     bs->buffer = calloc(bs->max_size_in_dword * sizeof(int), 1);  in bitstream_start()
179     bs->bit_offset = 0;  in bitstream_start()
183 bitstream_end(bitstream *bs)  in bitstream_end()  argument
185     int pos = (bs->bit_offset >> 5);  in bitstream_end()
186     int bit_offset = (bs->bit_offset & 0x1f);  in bitstream_end()
190         bs->buffer[pos] = swap32((bs->buffer[pos] << bit_left));  in bitstream_end()
195 bitstream_put_ui(bitstream *bs, unsigned int val, int size_in_bits)  in bitstream_put_ui()  argument
197     int pos = (bs->bit_offset >> 5);  in bitstream_put_ui()
198     int bit_offset = (bs->bit_offset & 0x1f);  in bitstream_put_ui()
207     bs->bit_offset += size_in_bits;  in bitstream_put_ui()
210         bs->buffer[pos] = (bs->buffer[pos] << size_in_bits | val);  in bitstream_put_ui()
213         bs->buffer[pos] = (bs->buffer[pos] << bit_left) | (val >> size_in_bits);  in bitstream_put_ui()
214         bs->buffer[pos] = swap32(bs->buffer[pos]);  in bitstream_put_ui()
216         if (pos + 1 == bs->max_size_in_dword) {  in bitstream_put_ui()
217             bs->max_size_in_dword += BITSTREAM_ALLOCATE_STEPPING;  in bitstream_put_ui()
218             bs->buffer = realloc(bs->buffer, bs->max_size_in_dword * sizeof(unsigned int));  in bitstream_put_ui()
221         bs->buffer[pos + 1] = val;  in bitstream_put_ui()
226 bitstream_byte_aligning(bitstream *bs, int bit)  in bitstream_byte_aligning()  argument
228     int bit_offset = (bs->bit_offset & 0x7);  in bitstream_byte_aligning()
242     bitstream_put_ui(bs, new_val, bit_left);  in bitstream_byte_aligning()
282          bitstream *bs)  in sps_rbsp()  argument
287         bitstream_put_ui(bs, START_CODE_SEQ, 32);  in sps_rbsp()
288         bitstream_put_ui(bs, seq_param->picture_width, 12);  in sps_rbsp()
289         bitstream_put_ui(bs, seq_param->picture_height, 12);  in sps_rbsp()
290         bitstream_put_ui(bs, seq_param->aspect_ratio_information, 4);  in sps_rbsp()
291         bitstream_put_ui(bs, frame_rate_code, 4); /* frame_rate_code */  in sps_rbsp()
292 …bitstream_put_ui(bs, (seq_param->bits_per_second + 399) / 400, 18); /* the low 18 bits of bit_rate…  in sps_rbsp()
293         bitstream_put_ui(bs, 1, 1); /* marker_bit */  in sps_rbsp()
294         bitstream_put_ui(bs, seq_param->vbv_buffer_size, 10);  in sps_rbsp()
295         bitstream_put_ui(bs, 0, 1); /* constraint_parameter_flag, always 0 for MPEG-2 */  in sps_rbsp()
296         bitstream_put_ui(bs, 0, 1); /* load_intra_quantiser_matrix */  in sps_rbsp()
297         bitstream_put_ui(bs, 0, 1); /* load_non_intra_quantiser_matrix */  in sps_rbsp()
299         bitstream_byte_aligning(bs, 0);  in sps_rbsp()
301         bitstream_put_ui(bs, START_CODE_EXT, 32);  in sps_rbsp()
302         bitstream_put_ui(bs, 1, 4); /* sequence_extension id */  in sps_rbsp()
303         bitstream_put_ui(bs, seq_param->sequence_extension.bits.profile_and_level_indication, 8);  in sps_rbsp()
304         bitstream_put_ui(bs, seq_param->sequence_extension.bits.progressive_sequence, 1);  in sps_rbsp()
305         bitstream_put_ui(bs, seq_param->sequence_extension.bits.chroma_format, 2);  in sps_rbsp()
306         bitstream_put_ui(bs, seq_param->picture_width >> 12, 2);  in sps_rbsp()
307         bitstream_put_ui(bs, seq_param->picture_height >> 12, 2);  in sps_rbsp()
308 …bitstream_put_ui(bs, ((seq_param->bits_per_second + 399) / 400) >> 18, 12); /* bit_rate_extension …  in sps_rbsp()
309         bitstream_put_ui(bs, 1, 1); /* marker_bit */  in sps_rbsp()
310         bitstream_put_ui(bs, seq_param->vbv_buffer_size >> 10, 8);  in sps_rbsp()
311         bitstream_put_ui(bs, seq_param->sequence_extension.bits.low_delay, 1);  in sps_rbsp()
312         bitstream_put_ui(bs, seq_param->sequence_extension.bits.frame_rate_extension_n, 2);  in sps_rbsp()
313         bitstream_put_ui(bs, seq_param->sequence_extension.bits.frame_rate_extension_d, 5);  in sps_rbsp()
315         bitstream_byte_aligning(bs, 0);  in sps_rbsp()
319         bitstream_put_ui(bs, START_CODE_GOP, 32);  in sps_rbsp()
320         bitstream_put_ui(bs, seq_param->gop_header.bits.time_code, 25);  in sps_rbsp()
321         bitstream_put_ui(bs, seq_param->gop_header.bits.closed_gop, 1);  in sps_rbsp()
322         bitstream_put_ui(bs, seq_param->gop_header.bits.broken_link, 1);  in sps_rbsp()
324         bitstream_byte_aligning(bs, 0);  in sps_rbsp()
331          bitstream *bs)  in pps_rbsp()  argument
340     bitstream_put_ui(bs, START_CODE_PICUTRE, 32);  in pps_rbsp()
341     bitstream_put_ui(bs, pic_param->temporal_reference, 10);  in pps_rbsp()
342     bitstream_put_ui(bs,  in pps_rbsp()
346     bitstream_put_ui(bs, 0xFFFF, 16); /* vbv_delay, always 0xFFFF */  in pps_rbsp()
350         bitstream_put_ui(bs, 0, 1); /* full_pel_forward_vector, always 0 for MPEG-2 */  in pps_rbsp()
351         bitstream_put_ui(bs, 7, 3); /* forward_f_code, always 7 for MPEG-2 */  in pps_rbsp()
355         bitstream_put_ui(bs, 0, 1); /* full_pel_backward_vector, always 0 for MPEG-2 */  in pps_rbsp()
356         bitstream_put_ui(bs, 7, 3); /* backward_f_code, always 7 for MPEG-2 */  in pps_rbsp()
359     bitstream_put_ui(bs, 0, 1); /* extra_bit_picture, 0 */  in pps_rbsp()
361     bitstream_byte_aligning(bs, 0);  in pps_rbsp()
363     bitstream_put_ui(bs, START_CODE_EXT, 32);  in pps_rbsp()
364     bitstream_put_ui(bs, 8, 4); /* Picture Coding Extension ID: 8 */  in pps_rbsp()
365     bitstream_put_ui(bs, pic_param->f_code[0][0], 4);  in pps_rbsp()
366     bitstream_put_ui(bs, pic_param->f_code[0][1], 4);  in pps_rbsp()
367     bitstream_put_ui(bs, pic_param->f_code[1][0], 4);  in pps_rbsp()
368     bitstream_put_ui(bs, pic_param->f_code[1][1], 4);  in pps_rbsp()
370     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.intra_dc_precision, 2);  in pps_rbsp()
371     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.picture_structure, 2);  in pps_rbsp()
372     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.top_field_first, 1);  in pps_rbsp()
373     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.frame_pred_frame_dct, 1);  in pps_rbsp()
374     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.concealment_motion_vectors, 1);  in pps_rbsp()
375     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.q_scale_type, 1);  in pps_rbsp()
376     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.intra_vlc_format, 1);  in pps_rbsp()
377     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.alternate_scan, 1);  in pps_rbsp()
378     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.repeat_first_field, 1);  in pps_rbsp()
379     bitstream_put_ui(bs, chroma_420_type, 1);  in pps_rbsp()
380     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.progressive_frame, 1);  in pps_rbsp()
381     bitstream_put_ui(bs, pic_param->picture_coding_extension.bits.composite_display_flag, 1);  in pps_rbsp()
383     bitstream_byte_aligning(bs, 0);  in pps_rbsp()
391     bitstream bs;  in build_packed_pic_buffer()  local
393     bitstream_start(&bs);  in build_packed_pic_buffer()
394     pps_rbsp(seq_param, pic_param, &bs);  in build_packed_pic_buffer()
395     bitstream_end(&bs);  in build_packed_pic_buffer()
397     *header_buffer = (unsigned char *)bs.buffer;  in build_packed_pic_buffer()
398     return bs.bit_offset;  in build_packed_pic_buffer()
406     bitstream bs;  in build_packed_seq_buffer()  local
408     bitstream_start(&bs);  in build_packed_seq_buffer()
409     sps_rbsp(ctx, seq_param, &bs);  in build_packed_seq_buffer()
410     bitstream_end(&bs);  in build_packed_seq_buffer()
412     *header_buffer = (unsigned char *)bs.buffer;  in build_packed_seq_buffer()
413     return bs.bit_offset;  in build_packed_seq_buffer()